20872736

素因数分解:

$2^5\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:142

約数の個数: 72

約数和(自身を含む): 45567396

約数和(自身を除く): 24694660

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 37, 61, 68, 74, 122, 136, 148, 244, 272, 289, 296, 488, 544, 578, 592, 629, 976, 1037, 1156, 1184, 1258, 1952, 2074, 2257, 2312, 2516, 4148, 4514, 4624, 5032, 8296, 9028, 9248, 10064, 10693, 16592, 17629, 18056, 20128, 21386, 33184, 35258, 36112, 38369, 42772, 70516, 72224, 76738, 85544, 141032, 153476, 171088, 282064, 306952, 342176, 564128, 613904, 652273, 1227808, 1304546, 2609092, 5218184, 10436368, 20872736]

約数ペア:

[(1, 20872736), (2, 10436368), (4, 5218184), (8, 2609092), (16, 1304546), (17, 1227808), (32, 652273), (34, 613904), (37, 564128), (61, 342176), (68, 306952), (74, 282064), (122, 171088), (136, 153476), (148, 141032), (244, 85544), (272, 76738), (289, 72224), (296, 70516), (488, 42772), (544, 38369), (578, 36112), (592, 35258), (629, 33184), (976, 21386), (1037, 20128), (1156, 18056), (1184, 17629), (1258, 16592), (1952, 10693), (2074, 10064), (2257, 9248), (2312, 9028), (2516, 8296), (4148, 5032), (4514, 4624)]