21854380

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{349}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 47980800

約数和(自身を除く): 26126420

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 101, 124, 155, 202, 310, 349, 404, 505, 620, 698, 1010, 1396, 1745, 2020, 3131, 3490, 6262, 6980, 10819, 12524, 15655, 21638, 31310, 35249, 43276, 54095, 62620, 70498, 108190, 140996, 176245, 216380, 352490, 704980, 1092719, 2185438, 4370876, 5463595, 10927190, 21854380]

約数ペア:

[(1, 21854380), (2, 10927190), (4, 5463595), (5, 4370876), (10, 2185438), (20, 1092719), (31, 704980), (62, 352490), (101, 216380), (124, 176245), (155, 140996), (202, 108190), (310, 70498), (349, 62620), (404, 54095), (505, 43276), (620, 35249), (698, 31310), (1010, 21638), (1396, 15655), (1745, 12524), (2020, 10819), (3131, 6980), (3490, 6262)]