254879980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{8423}}^1$

素因数の和:8538

約数の個数: 48

約数和(自身を含む): 573168960

約数和(自身を除く): 318288980

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 890, 1513, 1780, 3026, 6052, 7565, 8423, 15130, 16846, 30260, 33692, 42115, 84230, 143191, 168460, 286382, 572764, 715955, 749647, 1431910, 1499294, 2863820, 2998588, 3748235, 7496470, 12743999, 14992940, 25487998, 50975996, 63719995, 127439990, 254879980]

約数ペア:

[(1, 254879980), (2, 127439990), (4, 63719995), (5, 50975996), (10, 25487998), (17, 14992940), (20, 12743999), (34, 7496470), (68, 3748235), (85, 2998588), (89, 2863820), (170, 1499294), (178, 1431910), (340, 749647), (356, 715955), (445, 572764), (890, 286382), (1513, 168460), (1780, 143191), (3026, 84230), (6052, 42115), (7565, 33692), (8423, 30260), (15130, 16846)]