20211990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:317

約数の個数: 64

約数和(自身を含む): 50561280

約数和(自身を除く): 30349290

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 37, 74, 111, 131, 139, 185, 222, 262, 278, 370, 393, 417, 555, 655, 695, 786, 834, 1110, 1310, 1390, 1965, 2085, 3930, 4170, 4847, 5143, 9694, 10286, 14541, 15429, 18209, 24235, 25715, 29082, 30858, 36418, 48470, 51430, 54627, 72705, 77145, 91045, 109254, 145410, 154290, 182090, 273135, 546270, 673733, 1347466, 2021199, 3368665, 4042398, 6737330, 10105995, 20211990]

約数ペア:

[(1, 20211990), (2, 10105995), (3, 6737330), (5, 4042398), (6, 3368665), (10, 2021199), (15, 1347466), (30, 673733), (37, 546270), (74, 273135), (111, 182090), (131, 154290), (139, 145410), (185, 109254), (222, 91045), (262, 77145), (278, 72705), (370, 54627), (393, 51430), (417, 48470), (555, 36418), (655, 30858), (695, 29082), (786, 25715), (834, 24235), (1110, 18209), (1310, 15429), (1390, 14541), (1965, 10286), (2085, 9694), (3930, 5143), (4170, 4847)]