21159880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75571}}^1$

素因数の和:75589

約数の個数: 32

約数和(自身を含む): 54411840

約数和(自身を除く): 33251960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75571, 151142, 302284, 377855, 528997, 604568, 755710, 1057994, 1511420, 2115988, 2644985, 3022840, 4231976, 5289970, 10579940, 21159880]

約数ペア:

[(1, 21159880), (2, 10579940), (4, 5289970), (5, 4231976), (7, 3022840), (8, 2644985), (10, 2115988), (14, 1511420), (20, 1057994), (28, 755710), (35, 604568), (40, 528997), (56, 377855), (70, 302284), (140, 151142), (280, 75571)]