20489820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{241}}^1$

素因数の和:375

約数の個数: 96

約数和(自身を含む): 62610240

約数和(自身を除く): 42120420

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 109, 130, 156, 195, 218, 241, 260, 327, 390, 436, 482, 545, 654, 723, 780, 964, 1090, 1205, 1308, 1417, 1446, 1635, 2180, 2410, 2834, 2892, 3133, 3270, 3615, 4251, 4820, 5668, 6266, 6540, 7085, 7230, 8502, 9399, 12532, 14170, 14460, 15665, 17004, 18798, 21255, 26269, 28340, 31330, 37596, 42510, 46995, 52538, 62660, 78807, 85020, 93990, 105076, 131345, 157614, 187980, 262690, 315228, 341497, 394035, 525380, 682994, 788070, 1024491, 1365988, 1576140, 1707485, 2048982, 3414970, 4097964, 5122455, 6829940, 10244910, 20489820]

約数ペア:

[(1, 20489820), (2, 10244910), (3, 6829940), (4, 5122455), (5, 4097964), (6, 3414970), (10, 2048982), (12, 1707485), (13, 1576140), (15, 1365988), (20, 1024491), (26, 788070), (30, 682994), (39, 525380), (52, 394035), (60, 341497), (65, 315228), (78, 262690), (109, 187980), (130, 157614), (156, 131345), (195, 105076), (218, 93990), (241, 85020), (260, 78807), (327, 62660), (390, 52538), (436, 46995), (482, 42510), (545, 37596), (654, 31330), (723, 28340), (780, 26269), (964, 21255), (1090, 18798), (1205, 17004), (1308, 15665), (1417, 14460), (1446, 14170), (1635, 12532), (2180, 9399), (2410, 8502), (2834, 7230), (2892, 7085), (3133, 6540), (3270, 6266), (3615, 5668), (4251, 4820)]