81649540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{25357}}^1$

素因数の和:25396

約数の個数: 48

約数和(自身を含む): 204486912

約数和(自身を除く): 122837372

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 25357, 50714, 101428, 126785, 177499, 253570, 354998, 507140, 583211, 709996, 887495, 1166422, 1774990, 2332844, 2916055, 3549980, 4082477, 5832110, 8164954, 11664220, 16329908, 20412385, 40824770, 81649540]

約数ペア:

[(1, 81649540), (2, 40824770), (4, 20412385), (5, 16329908), (7, 11664220), (10, 8164954), (14, 5832110), (20, 4082477), (23, 3549980), (28, 2916055), (35, 2332844), (46, 1774990), (70, 1166422), (92, 887495), (115, 709996), (140, 583211), (161, 507140), (230, 354998), (322, 253570), (460, 177499), (644, 126785), (805, 101428), (1610, 50714), (3220, 25357)]