21151520

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10169}}^1$

素因数の和:10197

約数の個数: 48

約数和(自身を含む): 53819640

約数和(自身を除く): 32668120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10169, 20338, 40676, 50845, 81352, 101690, 132197, 162704, 203380, 264394, 325408, 406760, 528788, 660985, 813520, 1057576, 1321970, 1627040, 2115152, 2643940, 4230304, 5287880, 10575760, 21151520]

約数ペア:

[(1, 21151520), (2, 10575760), (4, 5287880), (5, 4230304), (8, 2643940), (10, 2115152), (13, 1627040), (16, 1321970), (20, 1057576), (26, 813520), (32, 660985), (40, 528788), (52, 406760), (65, 325408), (80, 264394), (104, 203380), (130, 162704), (160, 132197), (208, 101690), (260, 81352), (416, 50845), (520, 40676), (1040, 20338), (2080, 10169)]