20854785

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:238

約数の個数: 64

約数和(自身を含む): 40550400

約数和(自身を除く): 19695615

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 43, 93, 105, 129, 149, 155, 215, 217, 301, 447, 465, 645, 651, 745, 903, 1043, 1085, 1333, 1505, 2235, 3129, 3255, 3999, 4515, 4619, 5215, 6407, 6665, 9331, 13857, 15645, 19221, 19995, 23095, 27993, 32035, 32333, 44849, 46655, 69285, 96105, 96999, 134547, 139965, 161665, 198617, 224245, 484995, 595851, 672735, 993085, 1390319, 2979255, 4170957, 6951595, 20854785]

約数ペア:

[(1, 20854785), (3, 6951595), (5, 4170957), (7, 2979255), (15, 1390319), (21, 993085), (31, 672735), (35, 595851), (43, 484995), (93, 224245), (105, 198617), (129, 161665), (149, 139965), (155, 134547), (215, 96999), (217, 96105), (301, 69285), (447, 46655), (465, 44849), (645, 32333), (651, 32035), (745, 27993), (903, 23095), (1043, 19995), (1085, 19221), (1333, 15645), (1505, 13857), (2235, 9331), (3129, 6665), (3255, 6407), (3999, 5215), (4515, 4619)]