20332520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{641}}^1$

素因数の和:726

約数の個数: 64

約数和(自身を含む): 50153040

約数和(自身を除く): 29820520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 61, 65, 104, 122, 130, 244, 260, 305, 488, 520, 610, 641, 793, 1220, 1282, 1586, 2440, 2564, 3172, 3205, 3965, 5128, 6344, 6410, 7930, 8333, 12820, 15860, 16666, 25640, 31720, 33332, 39101, 41665, 66664, 78202, 83330, 156404, 166660, 195505, 312808, 333320, 391010, 508313, 782020, 1016626, 1564040, 2033252, 2541565, 4066504, 5083130, 10166260, 20332520]

約数ペア:

[(1, 20332520), (2, 10166260), (4, 5083130), (5, 4066504), (8, 2541565), (10, 2033252), (13, 1564040), (20, 1016626), (26, 782020), (40, 508313), (52, 391010), (61, 333320), (65, 312808), (104, 195505), (122, 166660), (130, 156404), (244, 83330), (260, 78202), (305, 66664), (488, 41665), (520, 39101), (610, 33332), (641, 31720), (793, 25640), (1220, 16666), (1282, 15860), (1586, 12820), (2440, 8333), (2564, 7930), (3172, 6410), (3205, 6344), (3965, 5128)]