21529990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{1423}}^1$

素因数の和:1536

約数の個数: 32

約数和(自身を含む): 41523840

約数和(自身を除く): 19993850

約数列:

[1, 2, 5, 10, 17, 34, 85, 89, 170, 178, 445, 890, 1423, 1513, 2846, 3026, 7115, 7565, 14230, 15130, 24191, 48382, 120955, 126647, 241910, 253294, 633235, 1266470, 2152999, 4305998, 10764995, 21529990]

約数ペア:

[(1, 21529990), (2, 10764995), (5, 4305998), (10, 2152999), (17, 1266470), (34, 633235), (85, 253294), (89, 241910), (170, 126647), (178, 120955), (445, 48382), (890, 24191), (1423, 15130), (1513, 14230), (2846, 7565), (3026, 7115)]