21640480

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4363}}^1$

素因数の和:4409

約数の個数: 48

約数和(自身を含む): 52786944

約数和(自身を除く): 31146464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4363, 4960, 8726, 17452, 21815, 34904, 43630, 69808, 87260, 135253, 139616, 174520, 270506, 349040, 541012, 676265, 698080, 1082024, 1352530, 2164048, 2705060, 4328096, 5410120, 10820240, 21640480]

約数ペア:

[(1, 21640480), (2, 10820240), (4, 5410120), (5, 4328096), (8, 2705060), (10, 2164048), (16, 1352530), (20, 1082024), (31, 698080), (32, 676265), (40, 541012), (62, 349040), (80, 270506), (124, 174520), (155, 139616), (160, 135253), (248, 87260), (310, 69808), (496, 43630), (620, 34904), (992, 21815), (1240, 17452), (2480, 8726), (4363, 4960)]