21991338

素因数分解:

$2^1\times 3^4\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:225

約数の個数: 80

約数和(自身を含む): 52968960

約数和(自身を除く): 30977622

約数列:

[1, 2, 3, 6, 9, 18, 27, 29, 31, 54, 58, 62, 81, 87, 93, 151, 162, 174, 186, 261, 279, 302, 453, 522, 558, 783, 837, 899, 906, 1359, 1566, 1674, 1798, 2349, 2511, 2697, 2718, 4077, 4379, 4681, 4698, 5022, 5394, 8091, 8154, 8758, 9362, 12231, 13137, 14043, 16182, 24273, 24462, 26274, 28086, 39411, 42129, 48546, 72819, 78822, 84258, 118233, 126387, 135749, 145638, 236466, 252774, 271498, 354699, 379161, 407247, 709398, 758322, 814494, 1221741, 2443482, 3665223, 7330446, 10995669, 21991338]

約数ペア:

[(1, 21991338), (2, 10995669), (3, 7330446), (6, 3665223), (9, 2443482), (18, 1221741), (27, 814494), (29, 758322), (31, 709398), (54, 407247), (58, 379161), (62, 354699), (81, 271498), (87, 252774), (93, 236466), (151, 145638), (162, 135749), (174, 126387), (186, 118233), (261, 84258), (279, 78822), (302, 72819), (453, 48546), (522, 42129), (558, 39411), (783, 28086), (837, 26274), (899, 24462), (906, 24273), (1359, 16182), (1566, 14043), (1674, 13137), (1798, 12231), (2349, 9362), (2511, 8758), (2697, 8154), (2718, 8091), (4077, 5394), (4379, 5022), (4681, 4698)]