20403760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{853}}^1$

素因数の和:902

約数の個数: 80

約数和(自身を含む): 53371584

約数和(自身を除く): 32967824

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 40, 46, 52, 65, 80, 92, 104, 115, 130, 184, 208, 230, 260, 299, 368, 460, 520, 598, 853, 920, 1040, 1196, 1495, 1706, 1840, 2392, 2990, 3412, 4265, 4784, 5980, 6824, 8530, 11089, 11960, 13648, 17060, 19619, 22178, 23920, 34120, 39238, 44356, 55445, 68240, 78476, 88712, 98095, 110890, 156952, 177424, 196190, 221780, 255047, 313904, 392380, 443560, 510094, 784760, 887120, 1020188, 1275235, 1569520, 2040376, 2550470, 4080752, 5100940, 10201880, 20403760]

約数ペア:

[(1, 20403760), (2, 10201880), (4, 5100940), (5, 4080752), (8, 2550470), (10, 2040376), (13, 1569520), (16, 1275235), (20, 1020188), (23, 887120), (26, 784760), (40, 510094), (46, 443560), (52, 392380), (65, 313904), (80, 255047), (92, 221780), (104, 196190), (115, 177424), (130, 156952), (184, 110890), (208, 98095), (230, 88712), (260, 78476), (299, 68240), (368, 55445), (460, 44356), (520, 39238), (598, 34120), (853, 23920), (920, 22178), (1040, 19619), (1196, 17060), (1495, 13648), (1706, 11960), (1840, 11089), (2392, 8530), (2990, 6824), (3412, 5980), (4265, 4784)]