81312400

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{823}}^1$

素因数の和:873

約数の個数: 120

約数和(自身を含む): 221721920

約数和(自身を除く): 140409520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 25, 26, 38, 40, 50, 52, 65, 76, 80, 95, 100, 104, 130, 152, 190, 200, 208, 247, 260, 304, 325, 380, 400, 475, 494, 520, 650, 760, 823, 950, 988, 1040, 1235, 1300, 1520, 1646, 1900, 1976, 2470, 2600, 3292, 3800, 3952, 4115, 4940, 5200, 6175, 6584, 7600, 8230, 9880, 10699, 12350, 13168, 15637, 16460, 19760, 20575, 21398, 24700, 31274, 32920, 41150, 42796, 49400, 53495, 62548, 65840, 78185, 82300, 85592, 98800, 106990, 125096, 156370, 164600, 171184, 203281, 213980, 250192, 267475, 312740, 329200, 390925, 406562, 427960, 534950, 625480, 781850, 813124, 855920, 1016405, 1069900, 1250960, 1563700, 1626248, 2032810, 2139800, 3127400, 3252496, 4065620, 4279600, 5082025, 6254800, 8131240, 10164050, 16262480, 20328100, 40656200, 81312400]

約数ペア:

[(1, 81312400), (2, 40656200), (4, 20328100), (5, 16262480), (8, 10164050), (10, 8131240), (13, 6254800), (16, 5082025), (19, 4279600), (20, 4065620), (25, 3252496), (26, 3127400), (38, 2139800), (40, 2032810), (50, 1626248), (52, 1563700), (65, 1250960), (76, 1069900), (80, 1016405), (95, 855920), (100, 813124), (104, 781850), (130, 625480), (152, 534950), (190, 427960), (200, 406562), (208, 390925), (247, 329200), (260, 312740), (304, 267475), (325, 250192), (380, 213980), (400, 203281), (475, 171184), (494, 164600), (520, 156370), (650, 125096), (760, 106990), (823, 98800), (950, 85592), (988, 82300), (1040, 78185), (1235, 65840), (1300, 62548), (1520, 53495), (1646, 49400), (1900, 42796), (1976, 41150), (2470, 32920), (2600, 31274), (3292, 24700), (3800, 21398), (3952, 20575), (4115, 19760), (4940, 16460), (5200, 15637), (6175, 13168), (6584, 12350), (7600, 10699), (8230, 9880)]