18647980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4219}}^1$

素因数の和:4258

約数の個数: 48

約数和(自身を含む): 44664480

約数和(自身を除く): 26016500

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4219, 4420, 8438, 16876, 21095, 42190, 54847, 71723, 84380, 109694, 143446, 219388, 274235, 286892, 358615, 548470, 717230, 932399, 1096940, 1434460, 1864798, 3729596, 4661995, 9323990, 18647980]

約数ペア:

[(1, 18647980), (2, 9323990), (4, 4661995), (5, 3729596), (10, 1864798), (13, 1434460), (17, 1096940), (20, 932399), (26, 717230), (34, 548470), (52, 358615), (65, 286892), (68, 274235), (85, 219388), (130, 143446), (170, 109694), (221, 84380), (260, 71723), (340, 54847), (442, 42190), (884, 21095), (1105, 16876), (2210, 8438), (4219, 4420)]