21434240

素因数分解:

$2^7\times 5^1\times {\mathrm{107}}^1\times {\mathrm{313}}^1$

素因数の和:439

約数の個数: 64

約数和(自身を含む): 51885360

約数和(自身を除く): 30451120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 107, 128, 160, 214, 313, 320, 428, 535, 626, 640, 856, 1070, 1252, 1565, 1712, 2140, 2504, 3130, 3424, 4280, 5008, 6260, 6848, 8560, 10016, 12520, 13696, 17120, 20032, 25040, 33491, 34240, 40064, 50080, 66982, 68480, 100160, 133964, 167455, 200320, 267928, 334910, 535856, 669820, 1071712, 1339640, 2143424, 2679280, 4286848, 5358560, 10717120, 21434240]

約数ペア:

[(1, 21434240), (2, 10717120), (4, 5358560), (5, 4286848), (8, 2679280), (10, 2143424), (16, 1339640), (20, 1071712), (32, 669820), (40, 535856), (64, 334910), (80, 267928), (107, 200320), (128, 167455), (160, 133964), (214, 100160), (313, 68480), (320, 66982), (428, 50080), (535, 40064), (626, 34240), (640, 33491), (856, 25040), (1070, 20032), (1252, 17120), (1565, 13696), (1712, 12520), (2140, 10016), (2504, 8560), (3130, 6848), (3424, 6260), (4280, 5008)]