12907780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{191}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 28385280

約数和(自身を除く): 15477500

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 109, 124, 155, 191, 218, 310, 382, 436, 545, 620, 764, 955, 1090, 1910, 2180, 3379, 3820, 5921, 6758, 11842, 13516, 16895, 20819, 23684, 29605, 33790, 41638, 59210, 67580, 83276, 104095, 118420, 208190, 416380, 645389, 1290778, 2581556, 3226945, 6453890, 12907780]

約数ペア:

[(1, 12907780), (2, 6453890), (4, 3226945), (5, 2581556), (10, 1290778), (20, 645389), (31, 416380), (62, 208190), (109, 118420), (124, 104095), (155, 83276), (191, 67580), (218, 59210), (310, 41638), (382, 33790), (436, 29605), (545, 23684), (620, 20819), (764, 16895), (955, 13516), (1090, 11842), (1910, 6758), (2180, 5921), (3379, 3820)]