81262580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{821}}^1$

素因数の和:945

約数の個数: 72

約数和(自身を含む): 200722536

約数和(自身を除く): 119459956

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 101, 140, 196, 202, 245, 404, 490, 505, 707, 821, 980, 1010, 1414, 1642, 2020, 2828, 3284, 3535, 4105, 4949, 5747, 7070, 8210, 9898, 11494, 14140, 16420, 19796, 22988, 24745, 28735, 40229, 49490, 57470, 80458, 82921, 98980, 114940, 160916, 165842, 201145, 331684, 402290, 414605, 580447, 804580, 829210, 1160894, 1658420, 2321788, 2902235, 4063129, 5804470, 8126258, 11608940, 16252516, 20315645, 40631290, 81262580]

約数ペア:

[(1, 81262580), (2, 40631290), (4, 20315645), (5, 16252516), (7, 11608940), (10, 8126258), (14, 5804470), (20, 4063129), (28, 2902235), (35, 2321788), (49, 1658420), (70, 1160894), (98, 829210), (101, 804580), (140, 580447), (196, 414605), (202, 402290), (245, 331684), (404, 201145), (490, 165842), (505, 160916), (707, 114940), (821, 98980), (980, 82921), (1010, 80458), (1414, 57470), (1642, 49490), (2020, 40229), (2828, 28735), (3284, 24745), (3535, 22988), (4105, 19796), (4949, 16420), (5747, 14140), (7070, 11494), (8210, 9898)]