20818642

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:155

約数の個数: 64

約数和(自身を含む): 39070080

約数和(自身を除く): 18251438

約数列:

[1, 2, 13, 17, 19, 26, 34, 37, 38, 67, 74, 134, 221, 247, 323, 442, 481, 494, 629, 646, 703, 871, 962, 1139, 1258, 1273, 1406, 1742, 2278, 2479, 2546, 4199, 4958, 8177, 8398, 9139, 11951, 14807, 16354, 16549, 18278, 21641, 23902, 29614, 32227, 33098, 42143, 43282, 47101, 64454, 84286, 94202, 155363, 281333, 310726, 547859, 562666, 612313, 800717, 1095718, 1224626, 1601434, 10409321, 20818642]

約数ペア:

[(1, 20818642), (2, 10409321), (13, 1601434), (17, 1224626), (19, 1095718), (26, 800717), (34, 612313), (37, 562666), (38, 547859), (67, 310726), (74, 281333), (134, 155363), (221, 94202), (247, 84286), (323, 64454), (442, 47101), (481, 43282), (494, 42143), (629, 33098), (646, 32227), (703, 29614), (871, 23902), (962, 21641), (1139, 18278), (1258, 16549), (1273, 16354), (1406, 14807), (1742, 11951), (2278, 9139), (2479, 8398), (2546, 8177), (4199, 4958)]