20519680

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1$

素因数の和:102

約数の個数: 144

約数和(自身を含む): 55629504

約数和(自身を除く): 35109824

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 23, 32, 34, 40, 41, 46, 64, 68, 80, 82, 85, 92, 115, 128, 136, 160, 164, 170, 184, 205, 230, 256, 272, 320, 328, 340, 368, 391, 410, 460, 544, 640, 656, 680, 697, 736, 782, 820, 920, 943, 1088, 1280, 1312, 1360, 1394, 1472, 1564, 1640, 1840, 1886, 1955, 2176, 2624, 2720, 2788, 2944, 3128, 3280, 3485, 3680, 3772, 3910, 4352, 4715, 5248, 5440, 5576, 5888, 6256, 6560, 6970, 7360, 7544, 7820, 9430, 10496, 10880, 11152, 12512, 13120, 13940, 14720, 15088, 15640, 16031, 18860, 21760, 22304, 25024, 26240, 27880, 29440, 30176, 31280, 32062, 37720, 44608, 50048, 52480, 55760, 60352, 62560, 64124, 75440, 80155, 89216, 100096, 111520, 120704, 125120, 128248, 150880, 160310, 178432, 223040, 241408, 250240, 256496, 301760, 320620, 446080, 500480, 512992, 603520, 641240, 892160, 1025984, 1207040, 1282480, 2051968, 2564960, 4103936, 5129920, 10259840, 20519680]

約数ペア:

[(1, 20519680), (2, 10259840), (4, 5129920), (5, 4103936), (8, 2564960), (10, 2051968), (16, 1282480), (17, 1207040), (20, 1025984), (23, 892160), (32, 641240), (34, 603520), (40, 512992), (41, 500480), (46, 446080), (64, 320620), (68, 301760), (80, 256496), (82, 250240), (85, 241408), (92, 223040), (115, 178432), (128, 160310), (136, 150880), (160, 128248), (164, 125120), (170, 120704), (184, 111520), (205, 100096), (230, 89216), (256, 80155), (272, 75440), (320, 64124), (328, 62560), (340, 60352), (368, 55760), (391, 52480), (410, 50048), (460, 44608), (544, 37720), (640, 32062), (656, 31280), (680, 30176), (697, 29440), (736, 27880), (782, 26240), (820, 25024), (920, 22304), (943, 21760), (1088, 18860), (1280, 16031), (1312, 15640), (1360, 15088), (1394, 14720), (1472, 13940), (1564, 13120), (1640, 12512), (1840, 11152), (1886, 10880), (1955, 10496), (2176, 9430), (2624, 7820), (2720, 7544), (2788, 7360), (2944, 6970), (3128, 6560), (3280, 6256), (3485, 5888), (3680, 5576), (3772, 5440), (3910, 5248), (4352, 4715)]