21208030

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^2$

素因数の和:161

約数の個数: 48

約数和(自身を含む): 41433984

約数和(自身を除く): 20225954

約数列:

[1, 2, 5, 10, 31, 37, 43, 62, 74, 86, 155, 185, 215, 310, 370, 430, 1147, 1333, 1591, 1849, 2294, 2666, 3182, 3698, 5735, 6665, 7955, 9245, 11470, 13330, 15910, 18490, 49321, 57319, 68413, 98642, 114638, 136826, 246605, 286595, 342065, 493210, 573190, 684130, 2120803, 4241606, 10604015, 21208030]

約数ペア:

[(1, 21208030), (2, 10604015), (5, 4241606), (10, 2120803), (31, 684130), (37, 573190), (43, 493210), (62, 342065), (74, 286595), (86, 246605), (155, 136826), (185, 114638), (215, 98642), (310, 68413), (370, 57319), (430, 49321), (1147, 18490), (1333, 15910), (1591, 13330), (1849, 11470), (2294, 9245), (2666, 7955), (3182, 6665), (3698, 5735)]