20995000

素因数分解:

$2^3\times 5^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1$

素因数の和:75

約数の個数: 160

約数和(自身を含む): 59043600

約数和(自身を除く): 38048600

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 19, 20, 25, 26, 34, 38, 40, 50, 52, 65, 68, 76, 85, 95, 100, 104, 125, 130, 136, 152, 170, 190, 200, 221, 247, 250, 260, 323, 325, 340, 380, 425, 442, 475, 494, 500, 520, 625, 646, 650, 680, 760, 850, 884, 950, 988, 1000, 1105, 1235, 1250, 1292, 1300, 1615, 1625, 1700, 1768, 1900, 1976, 2125, 2210, 2375, 2470, 2500, 2584, 2600, 3230, 3250, 3400, 3800, 4199, 4250, 4420, 4750, 4940, 5000, 5525, 6175, 6460, 6500, 8075, 8125, 8398, 8500, 8840, 9500, 9880, 10625, 11050, 11875, 12350, 12920, 13000, 16150, 16250, 16796, 17000, 19000, 20995, 21250, 22100, 23750, 24700, 27625, 30875, 32300, 32500, 33592, 40375, 41990, 42500, 44200, 47500, 49400, 55250, 61750, 64600, 65000, 80750, 83980, 85000, 95000, 104975, 110500, 123500, 138125, 154375, 161500, 167960, 201875, 209950, 221000, 247000, 276250, 308750, 323000, 403750, 419900, 524875, 552500, 617500, 807500, 839800, 1049750, 1105000, 1235000, 1615000, 2099500, 2624375, 4199000, 5248750, 10497500, 20995000]

約数ペア:

[(1, 20995000), (2, 10497500), (4, 5248750), (5, 4199000), (8, 2624375), (10, 2099500), (13, 1615000), (17, 1235000), (19, 1105000), (20, 1049750), (25, 839800), (26, 807500), (34, 617500), (38, 552500), (40, 524875), (50, 419900), (52, 403750), (65, 323000), (68, 308750), (76, 276250), (85, 247000), (95, 221000), (100, 209950), (104, 201875), (125, 167960), (130, 161500), (136, 154375), (152, 138125), (170, 123500), (190, 110500), (200, 104975), (221, 95000), (247, 85000), (250, 83980), (260, 80750), (323, 65000), (325, 64600), (340, 61750), (380, 55250), (425, 49400), (442, 47500), (475, 44200), (494, 42500), (500, 41990), (520, 40375), (625, 33592), (646, 32500), (650, 32300), (680, 30875), (760, 27625), (850, 24700), (884, 23750), (950, 22100), (988, 21250), (1000, 20995), (1105, 19000), (1235, 17000), (1250, 16796), (1292, 16250), (1300, 16150), (1615, 13000), (1625, 12920), (1700, 12350), (1768, 11875), (1900, 11050), (1976, 10625), (2125, 9880), (2210, 9500), (2375, 8840), (2470, 8500), (2500, 8398), (2584, 8125), (2600, 8075), (3230, 6500), (3250, 6460), (3400, 6175), (3800, 5525), (4199, 5000), (4250, 4940), (4420, 4750)]