1991629900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{227}}^1\times {\mathrm{397}}^1$

素因数の和:668

約数の個数: 144

約数和(自身を含む): 4962244896

約数和(自身を除く): 2970614996

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 25, 26, 34, 50, 52, 65, 68, 85, 100, 130, 170, 221, 227, 260, 325, 340, 397, 425, 442, 454, 650, 794, 850, 884, 908, 1105, 1135, 1300, 1588, 1700, 1985, 2210, 2270, 2951, 3859, 3970, 4420, 4540, 5161, 5525, 5675, 5902, 6749, 7718, 7940, 9925, 10322, 11050, 11350, 11804, 13498, 14755, 15436, 19295, 19850, 20644, 22100, 22700, 25805, 26996, 29510, 33745, 38590, 39700, 50167, 51610, 59020, 67490, 73775, 77180, 87737, 90119, 96475, 100334, 103220, 129025, 134980, 147550, 168725, 175474, 180238, 192950, 200668, 250835, 258050, 295100, 337450, 350948, 360476, 385900, 438685, 450595, 501670, 516100, 674900, 877370, 901190, 1003340, 1171547, 1254175, 1532023, 1754740, 1802380, 2193425, 2252975, 2343094, 2508350, 3064046, 4386850, 4505950, 4686188, 5016700, 5857735, 6128092, 7660115, 8773700, 9011900, 11715470, 15320230, 19916299, 23430940, 29288675, 30640460, 38300575, 39832598, 58577350, 76601150, 79665196, 99581495, 117154700, 153202300, 199162990, 398325980, 497907475, 995814950, 1991629900]

約数ペア:

[(1, 1991629900), (2, 995814950), (4, 497907475), (5, 398325980), (10, 199162990), (13, 153202300), (17, 117154700), (20, 99581495), (25, 79665196), (26, 76601150), (34, 58577350), (50, 39832598), (52, 38300575), (65, 30640460), (68, 29288675), (85, 23430940), (100, 19916299), (130, 15320230), (170, 11715470), (221, 9011900), (227, 8773700), (260, 7660115), (325, 6128092), (340, 5857735), (397, 5016700), (425, 4686188), (442, 4505950), (454, 4386850), (650, 3064046), (794, 2508350), (850, 2343094), (884, 2252975), (908, 2193425), (1105, 1802380), (1135, 1754740), (1300, 1532023), (1588, 1254175), (1700, 1171547), (1985, 1003340), (2210, 901190), (2270, 877370), (2951, 674900), (3859, 516100), (3970, 501670), (4420, 450595), (4540, 438685), (5161, 385900), (5525, 360476), (5675, 350948), (5902, 337450), (6749, 295100), (7718, 258050), (7940, 250835), (9925, 200668), (10322, 192950), (11050, 180238), (11350, 175474), (11804, 168725), (13498, 147550), (14755, 134980), (15436, 129025), (19295, 103220), (19850, 100334), (20644, 96475), (22100, 90119), (22700, 87737), (25805, 77180), (26996, 73775), (29510, 67490), (33745, 59020), (38590, 51610), (39700, 50167)]