18891460

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{521}}^1$

素因数の和:581

約数の個数: 72

約数和(自身を含む): 47487384

約数和(自身を除く): 28595924

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 98, 140, 148, 185, 196, 245, 259, 370, 490, 518, 521, 740, 980, 1036, 1042, 1295, 1813, 2084, 2590, 2605, 3626, 3647, 5180, 5210, 7252, 7294, 9065, 10420, 14588, 18130, 18235, 19277, 25529, 36260, 36470, 38554, 51058, 72940, 77108, 96385, 102116, 127645, 134939, 192770, 255290, 269878, 385540, 510580, 539756, 674695, 944573, 1349390, 1889146, 2698780, 3778292, 4722865, 9445730, 18891460]

約数ペア:

[(1, 18891460), (2, 9445730), (4, 4722865), (5, 3778292), (7, 2698780), (10, 1889146), (14, 1349390), (20, 944573), (28, 674695), (35, 539756), (37, 510580), (49, 385540), (70, 269878), (74, 255290), (98, 192770), (140, 134939), (148, 127645), (185, 102116), (196, 96385), (245, 77108), (259, 72940), (370, 51058), (490, 38554), (518, 36470), (521, 36260), (740, 25529), (980, 19277), (1036, 18235), (1042, 18130), (1295, 14588), (1813, 10420), (2084, 9065), (2590, 7294), (2605, 7252), (3626, 5210), (3647, 5180)]