19954700

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:243

約数の個数: 72

約数和(自身を含む): 46080384

約数和(自身を除く): 26125684

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 41, 50, 62, 82, 100, 124, 155, 157, 164, 205, 310, 314, 410, 620, 628, 775, 785, 820, 1025, 1271, 1550, 1570, 2050, 2542, 3100, 3140, 3925, 4100, 4867, 5084, 6355, 6437, 7850, 9734, 12710, 12874, 15700, 19468, 24335, 25420, 25748, 31775, 32185, 48670, 63550, 64370, 97340, 121675, 127100, 128740, 160925, 199547, 243350, 321850, 399094, 486700, 643700, 798188, 997735, 1995470, 3990940, 4988675, 9977350, 19954700]

約数ペア:

[(1, 19954700), (2, 9977350), (4, 4988675), (5, 3990940), (10, 1995470), (20, 997735), (25, 798188), (31, 643700), (41, 486700), (50, 399094), (62, 321850), (82, 243350), (100, 199547), (124, 160925), (155, 128740), (157, 127100), (164, 121675), (205, 97340), (310, 64370), (314, 63550), (410, 48670), (620, 32185), (628, 31775), (775, 25748), (785, 25420), (820, 24335), (1025, 19468), (1271, 15700), (1550, 12874), (1570, 12710), (2050, 9734), (2542, 7850), (3100, 6437), (3140, 6355), (3925, 5084), (4100, 4867)]