21313120

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4297}}^1$

素因数の和:4343

約数の個数: 48

約数和(自身を含む): 51988608

約数和(自身を除く): 30675488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4297, 4960, 8594, 17188, 21485, 34376, 42970, 68752, 85940, 133207, 137504, 171880, 266414, 343760, 532828, 666035, 687520, 1065656, 1332070, 2131312, 2664140, 4262624, 5328280, 10656560, 21313120]

約数ペア:

[(1, 21313120), (2, 10656560), (4, 5328280), (5, 4262624), (8, 2664140), (10, 2131312), (16, 1332070), (20, 1065656), (31, 687520), (32, 666035), (40, 532828), (62, 343760), (80, 266414), (124, 171880), (155, 137504), (160, 133207), (248, 85940), (310, 68752), (496, 42970), (620, 34376), (992, 21485), (1240, 17188), (2480, 8594), (4297, 4960)]