21019700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1$

素因数の和:106

約数の個数: 144

約数和(自身を含む): 55413120

約数和(自身を除く): 34393420

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 23, 25, 26, 37, 38, 46, 50, 52, 65, 74, 76, 92, 95, 100, 115, 130, 148, 185, 190, 230, 247, 260, 299, 325, 370, 380, 437, 460, 475, 481, 494, 575, 598, 650, 703, 740, 851, 874, 925, 950, 962, 988, 1150, 1196, 1235, 1300, 1406, 1495, 1702, 1748, 1850, 1900, 1924, 2185, 2300, 2405, 2470, 2812, 2990, 3404, 3515, 3700, 4255, 4370, 4810, 4940, 5681, 5980, 6175, 7030, 7475, 8510, 8740, 9139, 9620, 10925, 11063, 11362, 12025, 12350, 14060, 14950, 16169, 17020, 17575, 18278, 21275, 21850, 22126, 22724, 24050, 24700, 28405, 29900, 32338, 35150, 36556, 42550, 43700, 44252, 45695, 48100, 55315, 56810, 64676, 70300, 80845, 85100, 91390, 110630, 113620, 142025, 161690, 182780, 210197, 221260, 228475, 276575, 284050, 323380, 404225, 420394, 456950, 553150, 568100, 808450, 840788, 913900, 1050985, 1106300, 1616900, 2101970, 4203940, 5254925, 10509850, 21019700]

約数ペア:

[(1, 21019700), (2, 10509850), (4, 5254925), (5, 4203940), (10, 2101970), (13, 1616900), (19, 1106300), (20, 1050985), (23, 913900), (25, 840788), (26, 808450), (37, 568100), (38, 553150), (46, 456950), (50, 420394), (52, 404225), (65, 323380), (74, 284050), (76, 276575), (92, 228475), (95, 221260), (100, 210197), (115, 182780), (130, 161690), (148, 142025), (185, 113620), (190, 110630), (230, 91390), (247, 85100), (260, 80845), (299, 70300), (325, 64676), (370, 56810), (380, 55315), (437, 48100), (460, 45695), (475, 44252), (481, 43700), (494, 42550), (575, 36556), (598, 35150), (650, 32338), (703, 29900), (740, 28405), (851, 24700), (874, 24050), (925, 22724), (950, 22126), (962, 21850), (988, 21275), (1150, 18278), (1196, 17575), (1235, 17020), (1300, 16169), (1406, 14950), (1495, 14060), (1702, 12350), (1748, 12025), (1850, 11362), (1900, 11063), (1924, 10925), (2185, 9620), (2300, 9139), (2405, 8740), (2470, 8510), (2812, 7475), (2990, 7030), (3404, 6175), (3515, 5980), (3700, 5681), (4255, 4940), (4370, 4810)]