21381004

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 41580000

約数和(自身を除く): 20198996

約数列:

[1, 2, 4, 19, 29, 38, 58, 76, 89, 109, 116, 178, 218, 356, 436, 551, 1102, 1691, 2071, 2204, 2581, 3161, 3382, 4142, 5162, 6322, 6764, 8284, 9701, 10324, 12644, 19402, 38804, 49039, 60059, 98078, 120118, 184319, 196156, 240236, 281329, 368638, 562658, 737276, 1125316, 5345251, 10690502, 21381004]

約数ペア:

[(1, 21381004), (2, 10690502), (4, 5345251), (19, 1125316), (29, 737276), (38, 562658), (58, 368638), (76, 281329), (89, 240236), (109, 196156), (116, 184319), (178, 120118), (218, 98078), (356, 60059), (436, 49039), (551, 38804), (1102, 19402), (1691, 12644), (2071, 10324), (2204, 9701), (2581, 8284), (3161, 6764), (3382, 6322), (4142, 5162)]