31811780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1$

素因数の和:274

約数の個数: 144

約数和(自身を含む): 91699776

約数和(自身を除く): 59887996

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 49, 52, 55, 65, 70, 77, 91, 98, 110, 130, 140, 143, 154, 182, 196, 220, 227, 245, 260, 286, 308, 364, 385, 454, 455, 490, 539, 572, 637, 715, 770, 908, 910, 980, 1001, 1078, 1135, 1274, 1430, 1540, 1589, 1820, 2002, 2156, 2270, 2497, 2548, 2695, 2860, 2951, 3178, 3185, 4004, 4540, 4994, 5005, 5390, 5902, 6356, 6370, 7007, 7945, 9988, 10010, 10780, 11123, 11804, 12485, 12740, 14014, 14755, 15890, 17479, 20020, 20657, 22246, 24970, 28028, 29510, 31780, 32461, 34958, 35035, 41314, 44492, 49940, 55615, 59020, 64922, 69916, 70070, 82628, 87395, 103285, 111230, 122353, 129844, 140140, 144599, 162305, 174790, 206570, 222460, 227227, 244706, 289198, 324610, 349580, 413140, 454454, 489412, 578396, 611765, 649220, 722995, 908908, 1136135, 1223530, 1445990, 1590589, 2272270, 2447060, 2891980, 3181178, 4544540, 6362356, 7952945, 15905890, 31811780]

約数ペア:

[(1, 31811780), (2, 15905890), (4, 7952945), (5, 6362356), (7, 4544540), (10, 3181178), (11, 2891980), (13, 2447060), (14, 2272270), (20, 1590589), (22, 1445990), (26, 1223530), (28, 1136135), (35, 908908), (44, 722995), (49, 649220), (52, 611765), (55, 578396), (65, 489412), (70, 454454), (77, 413140), (91, 349580), (98, 324610), (110, 289198), (130, 244706), (140, 227227), (143, 222460), (154, 206570), (182, 174790), (196, 162305), (220, 144599), (227, 140140), (245, 129844), (260, 122353), (286, 111230), (308, 103285), (364, 87395), (385, 82628), (454, 70070), (455, 69916), (490, 64922), (539, 59020), (572, 55615), (637, 49940), (715, 44492), (770, 41314), (908, 35035), (910, 34958), (980, 32461), (1001, 31780), (1078, 29510), (1135, 28028), (1274, 24970), (1430, 22246), (1540, 20657), (1589, 20020), (1820, 17479), (2002, 15890), (2156, 14755), (2270, 14014), (2497, 12740), (2548, 12485), (2695, 11804), (2860, 11123), (2951, 10780), (3178, 10010), (3185, 9988), (4004, 7945), (4540, 7007), (4994, 6370), (5005, 6356), (5390, 5902)]