20180991775

素因数分解:

$5^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{283}}^1\times {\mathrm{2531}}^1$

素因数の和:2861

約数の個数: 72

約数和(自身を含む): 30495083904

約数和(自身を除く): 10314092129

約数列:

[1, 5, 7, 23, 25, 35, 49, 115, 161, 175, 245, 283, 575, 805, 1127, 1225, 1415, 1981, 2531, 4025, 5635, 6509, 7075, 9905, 12655, 13867, 17717, 28175, 32545, 45563, 49525, 58213, 63275, 69335, 88585, 124019, 162725, 227815, 291065, 318941, 346675, 407491, 442925, 620095, 716273, 1139075, 1455325, 1594705, 2037455, 2852437, 3100475, 3581365, 5013911, 7973525, 10187275, 14262185, 16474279, 17906825, 25069555, 35097377, 71310925, 82371395, 115319953, 125347775, 175486885, 411856975, 576599765, 807239671, 877434425, 2882998825, 4036198355, 20180991775]

約数ペア:

[(1, 20180991775), (5, 4036198355), (7, 2882998825), (23, 877434425), (25, 807239671), (35, 576599765), (49, 411856975), (115, 175486885), (161, 125347775), (175, 115319953), (245, 82371395), (283, 71310925), (575, 35097377), (805, 25069555), (1127, 17906825), (1225, 16474279), (1415, 14262185), (1981, 10187275), (2531, 7973525), (4025, 5013911), (5635, 3581365), (6509, 3100475), (7075, 2852437), (9905, 2037455), (12655, 1594705), (13867, 1455325), (17717, 1139075), (28175, 716273), (32545, 620095), (45563, 442925), (49525, 407491), (58213, 346675), (63275, 318941), (69335, 291065), (88585, 227815), (124019, 162725)]