21450140

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1193}}^1$

素因数の和:1262

約数の個数: 48

約数和(自身を含む): 48142080

約数和(自身を除く): 26691940

約数列:

[1, 2, 4, 5, 10, 20, 29, 31, 58, 62, 116, 124, 145, 155, 290, 310, 580, 620, 899, 1193, 1798, 2386, 3596, 4495, 4772, 5965, 8990, 11930, 17980, 23860, 34597, 36983, 69194, 73966, 138388, 147932, 172985, 184915, 345970, 369830, 691940, 739660, 1072507, 2145014, 4290028, 5362535, 10725070, 21450140]

約数ペア:

[(1, 21450140), (2, 10725070), (4, 5362535), (5, 4290028), (10, 2145014), (20, 1072507), (29, 739660), (31, 691940), (58, 369830), (62, 345970), (116, 184915), (124, 172985), (145, 147932), (155, 138388), (290, 73966), (310, 69194), (580, 36983), (620, 34597), (899, 23860), (1193, 17980), (1798, 11930), (2386, 8990), (3596, 5965), (4495, 4772)]