20409808

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{241}}^1$

素因数の和:395

約数の個数: 40

約数和(自身を含む): 40810880

約数和(自身を除く): 20401072

約数列:

[1, 2, 4, 8, 16, 67, 79, 134, 158, 241, 268, 316, 482, 536, 632, 964, 1072, 1264, 1928, 3856, 5293, 10586, 16147, 19039, 21172, 32294, 38078, 42344, 64588, 76156, 84688, 129176, 152312, 258352, 304624, 1275613, 2551226, 5102452, 10204904, 20409808]

約数ペア:

[(1, 20409808), (2, 10204904), (4, 5102452), (8, 2551226), (16, 1275613), (67, 304624), (79, 258352), (134, 152312), (158, 129176), (241, 84688), (268, 76156), (316, 64588), (482, 42344), (536, 38078), (632, 32294), (964, 21172), (1072, 19039), (1264, 16147), (1928, 10586), (3856, 5293)]