20871500

素因数分解:

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

素因数の和:77

約数の個数: 96

約数和(自身を含む): 51979200

約数和(自身を除く): 31107700

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 25, 26, 38, 50, 52, 65, 76, 95, 100, 125, 130, 169, 190, 247, 250, 260, 325, 338, 380, 475, 494, 500, 650, 676, 845, 950, 988, 1235, 1300, 1625, 1690, 1900, 2197, 2375, 2470, 3211, 3250, 3380, 4225, 4394, 4750, 4940, 6175, 6422, 6500, 8450, 8788, 9500, 10985, 12350, 12844, 16055, 16900, 21125, 21970, 24700, 30875, 32110, 41743, 42250, 43940, 54925, 61750, 64220, 80275, 83486, 84500, 109850, 123500, 160550, 166972, 208715, 219700, 274625, 321100, 401375, 417430, 549250, 802750, 834860, 1043575, 1098500, 1605500, 2087150, 4174300, 5217875, 10435750, 20871500]

約数ペア:

[(1, 20871500), (2, 10435750), (4, 5217875), (5, 4174300), (10, 2087150), (13, 1605500), (19, 1098500), (20, 1043575), (25, 834860), (26, 802750), (38, 549250), (50, 417430), (52, 401375), (65, 321100), (76, 274625), (95, 219700), (100, 208715), (125, 166972), (130, 160550), (169, 123500), (190, 109850), (247, 84500), (250, 83486), (260, 80275), (325, 64220), (338, 61750), (380, 54925), (475, 43940), (494, 42250), (500, 41743), (650, 32110), (676, 30875), (845, 24700), (950, 21970), (988, 21125), (1235, 16900), (1300, 16055), (1625, 12844), (1690, 12350), (1900, 10985), (2197, 9500), (2375, 8788), (2470, 8450), (3211, 6500), (3250, 6422), (3380, 6175), (4225, 4940), (4394, 4750)]