21715540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{239}}^1$

素因数の和:325

約数の個数: 96

約数和(自身を含む): 58060800

約数和(自身を除く): 36345260

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 59, 70, 77, 110, 118, 140, 154, 220, 236, 239, 295, 308, 385, 413, 478, 590, 649, 770, 826, 956, 1180, 1195, 1298, 1540, 1652, 1673, 2065, 2390, 2596, 2629, 3245, 3346, 4130, 4543, 4780, 5258, 6490, 6692, 8260, 8365, 9086, 10516, 12980, 13145, 14101, 16730, 18172, 18403, 22715, 26290, 28202, 33460, 36806, 45430, 52580, 56404, 70505, 73612, 90860, 92015, 98707, 141010, 155111, 184030, 197414, 282020, 310222, 368060, 394828, 493535, 620444, 775555, 987070, 1085777, 1551110, 1974140, 2171554, 3102220, 4343108, 5428885, 10857770, 21715540]

約数ペア:

[(1, 21715540), (2, 10857770), (4, 5428885), (5, 4343108), (7, 3102220), (10, 2171554), (11, 1974140), (14, 1551110), (20, 1085777), (22, 987070), (28, 775555), (35, 620444), (44, 493535), (55, 394828), (59, 368060), (70, 310222), (77, 282020), (110, 197414), (118, 184030), (140, 155111), (154, 141010), (220, 98707), (236, 92015), (239, 90860), (295, 73612), (308, 70505), (385, 56404), (413, 52580), (478, 45430), (590, 36806), (649, 33460), (770, 28202), (826, 26290), (956, 22715), (1180, 18403), (1195, 18172), (1298, 16730), (1540, 14101), (1652, 13145), (1673, 12980), (2065, 10516), (2390, 9086), (2596, 8365), (2629, 8260), (3245, 6692), (3346, 6490), (4130, 5258), (4543, 4780)]