20037760

素因数分解:

$2^7\times 5^1\times {\mathrm{131}}^1\times {\mathrm{239}}^1$

素因数の和:389

約数の個数: 64

約数和(自身を含む): 48470400

約数和(自身を除く): 28432640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 131, 160, 239, 262, 320, 478, 524, 640, 655, 956, 1048, 1195, 1310, 1912, 2096, 2390, 2620, 3824, 4192, 4780, 5240, 7648, 8384, 9560, 10480, 15296, 16768, 19120, 20960, 30592, 31309, 38240, 41920, 62618, 76480, 83840, 125236, 152960, 156545, 250472, 313090, 500944, 626180, 1001888, 1252360, 2003776, 2504720, 4007552, 5009440, 10018880, 20037760]

約数ペア:

[(1, 20037760), (2, 10018880), (4, 5009440), (5, 4007552), (8, 2504720), (10, 2003776), (16, 1252360), (20, 1001888), (32, 626180), (40, 500944), (64, 313090), (80, 250472), (128, 156545), (131, 152960), (160, 125236), (239, 83840), (262, 76480), (320, 62618), (478, 41920), (524, 38240), (640, 31309), (655, 30592), (956, 20960), (1048, 19120), (1195, 16768), (1310, 15296), (1912, 10480), (2096, 9560), (2390, 8384), (2620, 7648), (3824, 5240), (4192, 4780)]