18951020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{191}}^1$

素因数の和:263

約数の個数: 72

約数和(自身を含む): 45045504

約数和(自身を除く): 26094484

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 121, 164, 191, 205, 220, 242, 382, 410, 451, 484, 605, 764, 820, 902, 955, 1210, 1804, 1910, 2101, 2255, 2420, 3820, 4202, 4510, 4961, 7831, 8404, 9020, 9922, 10505, 15662, 19844, 21010, 23111, 24805, 31324, 39155, 42020, 46222, 49610, 78310, 86141, 92444, 99220, 115555, 156620, 172282, 231110, 344564, 430705, 462220, 861410, 947551, 1722820, 1895102, 3790204, 4737755, 9475510, 18951020]

約数ペア:

[(1, 18951020), (2, 9475510), (4, 4737755), (5, 3790204), (10, 1895102), (11, 1722820), (20, 947551), (22, 861410), (41, 462220), (44, 430705), (55, 344564), (82, 231110), (110, 172282), (121, 156620), (164, 115555), (191, 99220), (205, 92444), (220, 86141), (242, 78310), (382, 49610), (410, 46222), (451, 42020), (484, 39155), (605, 31324), (764, 24805), (820, 23111), (902, 21010), (955, 19844), (1210, 15662), (1804, 10505), (1910, 9922), (2101, 9020), (2255, 8404), (2420, 7831), (3820, 4961), (4202, 4510)]