21436240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{379}}^1$

素因数の和:500

約数の個数: 80

約数和(自身を含む): 57674880

約数和(自身を除く): 36238640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 101, 112, 140, 202, 280, 379, 404, 505, 560, 707, 758, 808, 1010, 1414, 1516, 1616, 1895, 2020, 2653, 2828, 3032, 3535, 3790, 4040, 5306, 5656, 6064, 7070, 7580, 8080, 10612, 11312, 13265, 14140, 15160, 21224, 26530, 28280, 30320, 38279, 42448, 53060, 56560, 76558, 106120, 153116, 191395, 212240, 267953, 306232, 382790, 535906, 612464, 765580, 1071812, 1339765, 1531160, 2143624, 2679530, 3062320, 4287248, 5359060, 10718120, 21436240]

約数ペア:

[(1, 21436240), (2, 10718120), (4, 5359060), (5, 4287248), (7, 3062320), (8, 2679530), (10, 2143624), (14, 1531160), (16, 1339765), (20, 1071812), (28, 765580), (35, 612464), (40, 535906), (56, 382790), (70, 306232), (80, 267953), (101, 212240), (112, 191395), (140, 153116), (202, 106120), (280, 76558), (379, 56560), (404, 53060), (505, 42448), (560, 38279), (707, 30320), (758, 28280), (808, 26530), (1010, 21224), (1414, 15160), (1516, 14140), (1616, 13265), (1895, 11312), (2020, 10612), (2653, 8080), (2828, 7580), (3032, 7070), (3535, 6064), (3790, 5656), (4040, 5306)]