21521440

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4339}}^1$

素因数の和:4385

約数の個数: 48

約数和(自身を含む): 52496640

約数和(自身を除く): 30975200

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, 4339, 4960, 8678, 17356, 21695, 34712, 43390, 69424, 86780, 134509, 138848, 173560, 269018, 347120, 538036, 672545, 694240, 1076072, 1345090, 2152144, 2690180, 4304288, 5380360, 10760720, 21521440]

約数ペア:

[(1, 21521440), (2, 10760720), (4, 5380360), (5, 4304288), (8, 2690180), (10, 2152144), (16, 1345090), (20, 1076072), (31, 694240), (32, 672545), (40, 538036), (62, 347120), (80, 269018), (124, 173560), (155, 138848), (160, 134509), (248, 86780), (310, 69424), (496, 43390), (620, 34712), (992, 21695), (1240, 17356), (2480, 8678), (4339, 4960)]