21831440

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8803}}^1$

素因数の和:8847

約数の個数: 40

約数和(自身を含む): 52401408

約数和(自身を除く): 30569968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8803, 17606, 35212, 44015, 70424, 88030, 140848, 176060, 272893, 352120, 545786, 704240, 1091572, 1364465, 2183144, 2728930, 4366288, 5457860, 10915720, 21831440]

約数ペア:

[(1, 21831440), (2, 10915720), (4, 5457860), (5, 4366288), (8, 2728930), (10, 2183144), (16, 1364465), (20, 1091572), (31, 704240), (40, 545786), (62, 352120), (80, 272893), (124, 176060), (155, 140848), (248, 88030), (310, 70424), (496, 44015), (620, 35212), (1240, 17606), (2480, 8803)]