20943320

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1621}}^1$

素因数の和:1668

約数の個数: 64

約数和(自身を含む): 52552800

約数和(自身を除く): 31609480

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 136, 152, 170, 190, 323, 340, 380, 646, 680, 760, 1292, 1615, 1621, 2584, 3230, 3242, 6460, 6484, 8105, 12920, 12968, 16210, 27557, 30799, 32420, 55114, 61598, 64840, 110228, 123196, 137785, 153995, 220456, 246392, 275570, 307990, 523583, 551140, 615980, 1047166, 1102280, 1231960, 2094332, 2617915, 4188664, 5235830, 10471660, 20943320]

約数ペア:

[(1, 20943320), (2, 10471660), (4, 5235830), (5, 4188664), (8, 2617915), (10, 2094332), (17, 1231960), (19, 1102280), (20, 1047166), (34, 615980), (38, 551140), (40, 523583), (68, 307990), (76, 275570), (85, 246392), (95, 220456), (136, 153995), (152, 137785), (170, 123196), (190, 110228), (323, 64840), (340, 61598), (380, 55114), (646, 32420), (680, 30799), (760, 27557), (1292, 16210), (1615, 12968), (1621, 12920), (2584, 8105), (3230, 6484), (3242, 6460)]