12920380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{281}}^1$

素因数の和:331

約数の個数: 72

約数和(自身を含む): 31505040

約数和(自身を除く): 18584660

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 121, 190, 209, 220, 242, 281, 380, 418, 484, 562, 605, 836, 1045, 1124, 1210, 1405, 2090, 2299, 2420, 2810, 3091, 4180, 4598, 5339, 5620, 6182, 9196, 10678, 11495, 12364, 15455, 21356, 22990, 26695, 30910, 34001, 45980, 53390, 58729, 61820, 68002, 106780, 117458, 136004, 170005, 234916, 293645, 340010, 587290, 646019, 680020, 1174580, 1292038, 2584076, 3230095, 6460190, 12920380]

約数ペア:

[(1, 12920380), (2, 6460190), (4, 3230095), (5, 2584076), (10, 1292038), (11, 1174580), (19, 680020), (20, 646019), (22, 587290), (38, 340010), (44, 293645), (55, 234916), (76, 170005), (95, 136004), (110, 117458), (121, 106780), (190, 68002), (209, 61820), (220, 58729), (242, 53390), (281, 45980), (380, 34001), (418, 30910), (484, 26695), (562, 22990), (605, 21356), (836, 15455), (1045, 12364), (1124, 11495), (1210, 10678), (1405, 9196), (2090, 6182), (2299, 5620), (2420, 5339), (2810, 4598), (3091, 4180)]