18860140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{251}}^1$

素因数の和:307

約数の個数: 72

約数和(自身を含む): 45490032

約数和(自身を除く): 26629892

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 251, 260, 289, 340, 442, 502, 578, 884, 1004, 1105, 1156, 1255, 1445, 2210, 2510, 2890, 3263, 3757, 4267, 4420, 5020, 5780, 6526, 7514, 8534, 13052, 15028, 16315, 17068, 18785, 21335, 32630, 37570, 42670, 55471, 65260, 72539, 75140, 85340, 110942, 145078, 221884, 277355, 290156, 362695, 554710, 725390, 943007, 1109420, 1450780, 1886014, 3772028, 4715035, 9430070, 18860140]

約数ペア:

[(1, 18860140), (2, 9430070), (4, 4715035), (5, 3772028), (10, 1886014), (13, 1450780), (17, 1109420), (20, 943007), (26, 725390), (34, 554710), (52, 362695), (65, 290156), (68, 277355), (85, 221884), (130, 145078), (170, 110942), (221, 85340), (251, 75140), (260, 72539), (289, 65260), (340, 55471), (442, 42670), (502, 37570), (578, 32630), (884, 21335), (1004, 18785), (1105, 17068), (1156, 16315), (1255, 15028), (1445, 13052), (2210, 8534), (2510, 7514), (2890, 6526), (3263, 5780), (3757, 5020), (4267, 4420)]