20123687968

素因数分解:

$2^5\times {\mathrm{19}}^2\times {\mathrm{499}}^1\times {\mathrm{3491}}^1$

素因数の和:4038

約数の個数: 72

約数和(自身を含む): 41909238000

約数和(自身を除く): 21785550032

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 152, 304, 361, 499, 608, 722, 998, 1444, 1996, 2888, 3491, 3992, 5776, 6982, 7984, 9481, 11552, 13964, 15968, 18962, 27928, 37924, 55856, 66329, 75848, 111712, 132658, 151696, 180139, 265316, 303392, 360278, 530632, 720556, 1061264, 1260251, 1441112, 1742009, 2122528, 2520502, 2882224, 3484018, 5041004, 5764448, 6968036, 10082008, 13936072, 20164016, 27872144, 33098171, 40328032, 55744288, 66196342, 132392684, 264785368, 529570736, 628865249, 1059141472, 1257730498, 2515460996, 5030921992, 10061843984, 20123687968]

約数ペア:

[(1, 20123687968), (2, 10061843984), (4, 5030921992), (8, 2515460996), (16, 1257730498), (19, 1059141472), (32, 628865249), (38, 529570736), (76, 264785368), (152, 132392684), (304, 66196342), (361, 55744288), (499, 40328032), (608, 33098171), (722, 27872144), (998, 20164016), (1444, 13936072), (1996, 10082008), (2888, 6968036), (3491, 5764448), (3992, 5041004), (5776, 3484018), (6982, 2882224), (7984, 2520502), (9481, 2122528), (11552, 1742009), (13964, 1441112), (15968, 1260251), (18962, 1061264), (27928, 720556), (37924, 530632), (55856, 360278), (66329, 303392), (75848, 265316), (111712, 180139), (132658, 151696)]