21328450

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1$

素因数の和:212

約数の個数: 96

約数和(自身を含む): 49371840

約数和(自身を除く): 28043390

約数列:

[1, 2, 5, 10, 11, 13, 19, 22, 25, 26, 38, 50, 55, 65, 95, 110, 130, 143, 157, 190, 209, 247, 275, 286, 314, 325, 418, 475, 494, 550, 650, 715, 785, 950, 1045, 1235, 1430, 1570, 1727, 2041, 2090, 2470, 2717, 2983, 3454, 3575, 3925, 4082, 5225, 5434, 5966, 6175, 7150, 7850, 8635, 10205, 10450, 12350, 13585, 14915, 17270, 20410, 22451, 27170, 29830, 32813, 38779, 43175, 44902, 51025, 65626, 67925, 74575, 77558, 86350, 102050, 112255, 135850, 149150, 164065, 193895, 224510, 328130, 387790, 426569, 561275, 820325, 853138, 969475, 1122550, 1640650, 1938950, 2132845, 4265690, 10664225, 21328450]

約数ペア:

[(1, 21328450), (2, 10664225), (5, 4265690), (10, 2132845), (11, 1938950), (13, 1640650), (19, 1122550), (22, 969475), (25, 853138), (26, 820325), (38, 561275), (50, 426569), (55, 387790), (65, 328130), (95, 224510), (110, 193895), (130, 164065), (143, 149150), (157, 135850), (190, 112255), (209, 102050), (247, 86350), (275, 77558), (286, 74575), (314, 67925), (325, 65626), (418, 51025), (475, 44902), (494, 43175), (550, 38779), (650, 32813), (715, 29830), (785, 27170), (950, 22451), (1045, 20410), (1235, 17270), (1430, 14915), (1570, 13585), (1727, 12350), (2041, 10450), (2090, 10205), (2470, 8635), (2717, 7850), (2983, 7150), (3454, 6175), (3575, 5966), (3925, 5434), (4082, 5225)]