21688520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2671}}^1$

素因数の和:2718

約数の個数: 64

約数和(自身を含む): 57715200

約数和(自身を除く): 36026680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 56, 58, 70, 116, 140, 145, 203, 232, 280, 290, 406, 580, 812, 1015, 1160, 1624, 2030, 2671, 4060, 5342, 8120, 10684, 13355, 18697, 21368, 26710, 37394, 53420, 74788, 77459, 93485, 106840, 149576, 154918, 186970, 309836, 373940, 387295, 542213, 619672, 747880, 774590, 1084426, 1549180, 2168852, 2711065, 3098360, 4337704, 5422130, 10844260, 21688520]

約数ペア:

[(1, 21688520), (2, 10844260), (4, 5422130), (5, 4337704), (7, 3098360), (8, 2711065), (10, 2168852), (14, 1549180), (20, 1084426), (28, 774590), (29, 747880), (35, 619672), (40, 542213), (56, 387295), (58, 373940), (70, 309836), (116, 186970), (140, 154918), (145, 149576), (203, 106840), (232, 93485), (280, 77459), (290, 74788), (406, 53420), (580, 37394), (812, 26710), (1015, 21368), (1160, 18697), (1624, 13355), (2030, 10684), (2671, 8120), (4060, 5342)]