398935780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:341

約数の個数: 96

約数和(自身を含む): 908812800

約数和(自身を除く): 509877020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 79, 95, 97, 137, 158, 190, 194, 274, 316, 380, 388, 395, 485, 548, 685, 790, 970, 1370, 1501, 1580, 1843, 1940, 2603, 2740, 3002, 3686, 5206, 6004, 7372, 7505, 7663, 9215, 10412, 10823, 13015, 13289, 15010, 15326, 18430, 21646, 26030, 26578, 30020, 30652, 36860, 38315, 43292, 52060, 53156, 54115, 66445, 76630, 108230, 132890, 145597, 153260, 205637, 216460, 252491, 265780, 291194, 411274, 504982, 582388, 727985, 822548, 1009964, 1028185, 1049831, 1262455, 1455970, 2056370, 2099662, 2524910, 2911940, 4112740, 4199324, 5049820, 5249155, 10498310, 19946789, 20996620, 39893578, 79787156, 99733945, 199467890, 398935780]

約数ペア:

[(1, 398935780), (2, 199467890), (4, 99733945), (5, 79787156), (10, 39893578), (19, 20996620), (20, 19946789), (38, 10498310), (76, 5249155), (79, 5049820), (95, 4199324), (97, 4112740), (137, 2911940), (158, 2524910), (190, 2099662), (194, 2056370), (274, 1455970), (316, 1262455), (380, 1049831), (388, 1028185), (395, 1009964), (485, 822548), (548, 727985), (685, 582388), (790, 504982), (970, 411274), (1370, 291194), (1501, 265780), (1580, 252491), (1843, 216460), (1940, 205637), (2603, 153260), (2740, 145597), (3002, 132890), (3686, 108230), (5206, 76630), (6004, 66445), (7372, 54115), (7505, 53156), (7663, 52060), (9215, 43292), (10412, 38315), (10823, 36860), (13015, 30652), (13289, 30020), (15010, 26578), (15326, 26030), (18430, 21646)]