20863908

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{409}}^1$

素因数の和:541

約数の個数: 72

約数和(自身を含む): 57457400

約数和(自身を除く): 36593492

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 109, 117, 156, 218, 234, 327, 409, 436, 468, 654, 818, 981, 1227, 1308, 1417, 1636, 1962, 2454, 2834, 3681, 3924, 4251, 4908, 5317, 5668, 7362, 8502, 10634, 12753, 14724, 15951, 17004, 21268, 25506, 31902, 44581, 47853, 51012, 63804, 89162, 95706, 133743, 178324, 191412, 267486, 401229, 534972, 579553, 802458, 1159106, 1604916, 1738659, 2318212, 3477318, 5215977, 6954636, 10431954, 20863908]

約数ペア:

[(1, 20863908), (2, 10431954), (3, 6954636), (4, 5215977), (6, 3477318), (9, 2318212), (12, 1738659), (13, 1604916), (18, 1159106), (26, 802458), (36, 579553), (39, 534972), (52, 401229), (78, 267486), (109, 191412), (117, 178324), (156, 133743), (218, 95706), (234, 89162), (327, 63804), (409, 51012), (436, 47853), (468, 44581), (654, 31902), (818, 25506), (981, 21268), (1227, 17004), (1308, 15951), (1417, 14724), (1636, 12753), (1962, 10634), (2454, 8502), (2834, 7362), (3681, 5668), (3924, 5317), (4251, 4908)]