18437980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{401}}^1$

素因数の和:451

約数の個数: 72

約数和(自身を含む): 44911440

約数和(自身を除く): 26473460

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 121, 190, 209, 220, 242, 380, 401, 418, 484, 605, 802, 836, 1045, 1210, 1604, 2005, 2090, 2299, 2420, 4010, 4180, 4411, 4598, 7619, 8020, 8822, 9196, 11495, 15238, 17644, 22055, 22990, 30476, 38095, 44110, 45980, 48521, 76190, 83809, 88220, 97042, 152380, 167618, 194084, 242605, 335236, 419045, 485210, 838090, 921899, 970420, 1676180, 1843798, 3687596, 4609495, 9218990, 18437980]

約数ペア:

[(1, 18437980), (2, 9218990), (4, 4609495), (5, 3687596), (10, 1843798), (11, 1676180), (19, 970420), (20, 921899), (22, 838090), (38, 485210), (44, 419045), (55, 335236), (76, 242605), (95, 194084), (110, 167618), (121, 152380), (190, 97042), (209, 88220), (220, 83809), (242, 76190), (380, 48521), (401, 45980), (418, 44110), (484, 38095), (605, 30476), (802, 22990), (836, 22055), (1045, 17644), (1210, 15238), (1604, 11495), (2005, 9196), (2090, 8822), (2299, 8020), (2420, 7619), (4010, 4598), (4180, 4411)]