25051720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{227}}^1$

素因数の和:358

約数の個数: 64

約数和(自身を含む): 59097600

約数和(自身を除く): 34045880

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 89, 124, 155, 178, 227, 248, 310, 356, 445, 454, 620, 712, 890, 908, 1135, 1240, 1780, 1816, 2270, 2759, 3560, 4540, 5518, 7037, 9080, 11036, 13795, 14074, 20203, 22072, 27590, 28148, 35185, 40406, 55180, 56296, 70370, 80812, 101015, 110360, 140740, 161624, 202030, 281480, 404060, 626293, 808120, 1252586, 2505172, 3131465, 5010344, 6262930, 12525860, 25051720]

約数ペア:

[(1, 25051720), (2, 12525860), (4, 6262930), (5, 5010344), (8, 3131465), (10, 2505172), (20, 1252586), (31, 808120), (40, 626293), (62, 404060), (89, 281480), (124, 202030), (155, 161624), (178, 140740), (227, 110360), (248, 101015), (310, 80812), (356, 70370), (445, 56296), (454, 55180), (620, 40406), (712, 35185), (890, 28148), (908, 27590), (1135, 22072), (1240, 20203), (1780, 14074), (1816, 13795), (2270, 11036), (2759, 9080), (3560, 7037), (4540, 5518)]