18891993640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{459883}}^1$

素因数の和:459986

約数の個数: 64

約数和(自身を含む): 46356307200

約数和(自身を除く): 27464313560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 79, 104, 130, 158, 260, 316, 395, 520, 632, 790, 1027, 1580, 2054, 3160, 4108, 5135, 8216, 10270, 20540, 41080, 459883, 919766, 1839532, 2299415, 3679064, 4598830, 5978479, 9197660, 11956958, 18395320, 23913916, 29892395, 36330757, 47827832, 59784790, 72661514, 119569580, 145323028, 181653785, 239139160, 290646056, 363307570, 472299841, 726615140, 944599682, 1453230280, 1889199364, 2361499205, 3778398728, 4722998410, 9445996820, 18891993640]

約数ペア:

[(1, 18891993640), (2, 9445996820), (4, 4722998410), (5, 3778398728), (8, 2361499205), (10, 1889199364), (13, 1453230280), (20, 944599682), (26, 726615140), (40, 472299841), (52, 363307570), (65, 290646056), (79, 239139160), (104, 181653785), (130, 145323028), (158, 119569580), (260, 72661514), (316, 59784790), (395, 47827832), (520, 36330757), (632, 29892395), (790, 23913916), (1027, 18395320), (1580, 11956958), (2054, 9197660), (3160, 5978479), (4108, 4598830), (5135, 3679064), (8216, 2299415), (10270, 1839532), (20540, 919766), (41080, 459883)]