18877740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{6421}}^1$

素因数の和:6447

約数の個数: 72

約数和(自身を含む): 61497072

約数和(自身を除く): 42619332

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 6421, 12842, 19263, 25684, 32105, 38526, 44947, 64210, 77052, 89894, 96315, 128420, 134841, 179788, 192630, 224735, 269682, 314629, 385260, 449470, 539364, 629258, 674205, 898940, 943887, 1258516, 1348410, 1573145, 1887774, 2696820, 3146290, 3775548, 4719435, 6292580, 9438870, 18877740]

約数ペア:

[(1, 18877740), (2, 9438870), (3, 6292580), (4, 4719435), (5, 3775548), (6, 3146290), (7, 2696820), (10, 1887774), (12, 1573145), (14, 1348410), (15, 1258516), (20, 943887), (21, 898940), (28, 674205), (30, 629258), (35, 539364), (42, 449470), (49, 385260), (60, 314629), (70, 269682), (84, 224735), (98, 192630), (105, 179788), (140, 134841), (147, 128420), (196, 96315), (210, 89894), (245, 77052), (294, 64210), (420, 44947), (490, 38526), (588, 32105), (735, 25684), (980, 19263), (1470, 12842), (2940, 6421)]