21291400

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{431}}^1$

素因数の和:479

約数の個数: 96

約数和(自身を含む): 56246400

約数和(自身を除く): 34955000

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 25, 26, 38, 40, 50, 52, 65, 76, 95, 100, 104, 130, 152, 190, 200, 247, 260, 325, 380, 431, 475, 494, 520, 650, 760, 862, 950, 988, 1235, 1300, 1724, 1900, 1976, 2155, 2470, 2600, 3448, 3800, 4310, 4940, 5603, 6175, 8189, 8620, 9880, 10775, 11206, 12350, 16378, 17240, 21550, 22412, 24700, 28015, 32756, 40945, 43100, 44824, 49400, 56030, 65512, 81890, 86200, 106457, 112060, 140075, 163780, 204725, 212914, 224120, 280150, 327560, 409450, 425828, 532285, 560300, 818900, 851656, 1064570, 1120600, 1637800, 2129140, 2661425, 4258280, 5322850, 10645700, 21291400]

約数ペア:

[(1, 21291400), (2, 10645700), (4, 5322850), (5, 4258280), (8, 2661425), (10, 2129140), (13, 1637800), (19, 1120600), (20, 1064570), (25, 851656), (26, 818900), (38, 560300), (40, 532285), (50, 425828), (52, 409450), (65, 327560), (76, 280150), (95, 224120), (100, 212914), (104, 204725), (130, 163780), (152, 140075), (190, 112060), (200, 106457), (247, 86200), (260, 81890), (325, 65512), (380, 56030), (431, 49400), (475, 44824), (494, 43100), (520, 40945), (650, 32756), (760, 28015), (862, 24700), (950, 22412), (988, 21550), (1235, 17240), (1300, 16378), (1724, 12350), (1900, 11206), (1976, 10775), (2155, 9880), (2470, 8620), (2600, 8189), (3448, 6175), (3800, 5603), (4310, 4940)]