19801808

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1$

素因数の和:172

約数の個数: 80

約数和(自身を含む): 44330496

約数和(自身を除く): 24528688

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 37, 52, 62, 74, 83, 104, 124, 148, 166, 208, 248, 296, 332, 403, 481, 496, 592, 664, 806, 962, 1079, 1147, 1328, 1612, 1924, 2158, 2294, 2573, 3071, 3224, 3848, 4316, 4588, 5146, 6142, 6448, 7696, 8632, 9176, 10292, 12284, 14911, 17264, 18352, 20584, 24568, 29822, 33449, 39923, 41168, 49136, 59644, 66898, 79846, 95201, 119288, 133796, 159692, 190402, 238576, 267592, 319384, 380804, 535184, 638768, 761608, 1237613, 1523216, 2475226, 4950452, 9900904, 19801808]

約数ペア:

[(1, 19801808), (2, 9900904), (4, 4950452), (8, 2475226), (13, 1523216), (16, 1237613), (26, 761608), (31, 638768), (37, 535184), (52, 380804), (62, 319384), (74, 267592), (83, 238576), (104, 190402), (124, 159692), (148, 133796), (166, 119288), (208, 95201), (248, 79846), (296, 66898), (332, 59644), (403, 49136), (481, 41168), (496, 39923), (592, 33449), (664, 29822), (806, 24568), (962, 20584), (1079, 18352), (1147, 17264), (1328, 14911), (1612, 12284), (1924, 10292), (2158, 9176), (2294, 8632), (2573, 7696), (3071, 6448), (3224, 6142), (3848, 5146), (4316, 4588)]