20408724

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{743}}^1$

素因数の和:869

約数の個数: 72

約数和(自身を含む): 59579520

約数和(自身を除く): 39170796

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 109, 126, 218, 252, 327, 436, 654, 743, 763, 981, 1308, 1486, 1526, 1962, 2229, 2289, 2972, 3052, 3924, 4458, 4578, 5201, 6687, 6867, 8916, 9156, 10402, 13374, 13734, 15603, 20804, 26748, 27468, 31206, 46809, 62412, 80987, 93618, 161974, 187236, 242961, 323948, 485922, 566909, 728883, 971844, 1133818, 1457766, 1700727, 2267636, 2915532, 3401454, 5102181, 6802908, 10204362, 20408724]

約数ペア:

[(1, 20408724), (2, 10204362), (3, 6802908), (4, 5102181), (6, 3401454), (7, 2915532), (9, 2267636), (12, 1700727), (14, 1457766), (18, 1133818), (21, 971844), (28, 728883), (36, 566909), (42, 485922), (63, 323948), (84, 242961), (109, 187236), (126, 161974), (218, 93618), (252, 80987), (327, 62412), (436, 46809), (654, 31206), (743, 27468), (763, 26748), (981, 20804), (1308, 15603), (1486, 13734), (1526, 13374), (1962, 10402), (2229, 9156), (2289, 8916), (2972, 6867), (3052, 6687), (3924, 5201), (4458, 4578)]