21269170

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 44352000

約数和(自身を除く): 23082830

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 79, 95, 109, 130, 158, 190, 218, 247, 395, 494, 545, 790, 1027, 1090, 1235, 1417, 1501, 2054, 2071, 2470, 2834, 3002, 4142, 5135, 7085, 7505, 8611, 10270, 10355, 14170, 15010, 17222, 19513, 20710, 26923, 39026, 43055, 53846, 86110, 97565, 111943, 134615, 163609, 195130, 223886, 269230, 327218, 559715, 818045, 1119430, 1636090, 2126917, 4253834, 10634585, 21269170]

約数ペア:

[(1, 21269170), (2, 10634585), (5, 4253834), (10, 2126917), (13, 1636090), (19, 1119430), (26, 818045), (38, 559715), (65, 327218), (79, 269230), (95, 223886), (109, 195130), (130, 163609), (158, 134615), (190, 111943), (218, 97565), (247, 86110), (395, 53846), (494, 43055), (545, 39026), (790, 26923), (1027, 20710), (1090, 19513), (1235, 17222), (1417, 15010), (1501, 14170), (2054, 10355), (2071, 10270), (2470, 8611), (2834, 7505), (3002, 7085), (4142, 5135)]