20577029960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{272039}}^1$

素因数の和:272142

約数の個数: 64

約数和(自身を含む): 48575462400

約数和(自身を除く): 27998432440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 61, 62, 122, 124, 155, 244, 248, 305, 310, 488, 610, 620, 1220, 1240, 1891, 2440, 3782, 7564, 9455, 15128, 18910, 37820, 75640, 272039, 544078, 1088156, 1360195, 2176312, 2720390, 5440780, 8433209, 10881560, 16594379, 16866418, 33188758, 33732836, 42166045, 66377516, 67465672, 82971895, 84332090, 132755032, 165943790, 168664180, 331887580, 337328360, 514425749, 663775160, 1028851498, 2057702996, 2572128745, 4115405992, 5144257490, 10288514980, 20577029960]

約数ペア:

[(1, 20577029960), (2, 10288514980), (4, 5144257490), (5, 4115405992), (8, 2572128745), (10, 2057702996), (20, 1028851498), (31, 663775160), (40, 514425749), (61, 337328360), (62, 331887580), (122, 168664180), (124, 165943790), (155, 132755032), (244, 84332090), (248, 82971895), (305, 67465672), (310, 66377516), (488, 42166045), (610, 33732836), (620, 33188758), (1220, 16866418), (1240, 16594379), (1891, 10881560), (2440, 8433209), (3782, 5440780), (7564, 2720390), (9455, 2176312), (15128, 1360195), (18910, 1088156), (37820, 544078), (75640, 272039)]