21538490

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 43711488

約数和(自身を除く): 22172998

約数列:

[1, 2, 5, 10, 17, 31, 34, 61, 62, 67, 85, 122, 134, 155, 170, 305, 310, 335, 527, 610, 670, 1037, 1054, 1139, 1891, 2074, 2077, 2278, 2635, 3782, 4087, 4154, 5185, 5270, 5695, 8174, 9455, 10370, 10385, 11390, 18910, 20435, 20770, 32147, 35309, 40870, 64294, 69479, 70618, 126697, 138958, 160735, 176545, 253394, 321470, 347395, 353090, 633485, 694790, 1266970, 2153849, 4307698, 10769245, 21538490]

約数ペア:

[(1, 21538490), (2, 10769245), (5, 4307698), (10, 2153849), (17, 1266970), (31, 694790), (34, 633485), (61, 353090), (62, 347395), (67, 321470), (85, 253394), (122, 176545), (134, 160735), (155, 138958), (170, 126697), (305, 70618), (310, 69479), (335, 64294), (527, 40870), (610, 35309), (670, 32147), (1037, 20770), (1054, 20435), (1139, 18910), (1891, 11390), (2074, 10385), (2077, 10370), (2278, 9455), (2635, 8174), (3782, 5695), (4087, 5270), (4154, 5185)]