20627920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{331}}^1$

素因数の和:404

約数の個数: 80

約数和(自身を含む): 51871680

約数和(自身を除く): 31243760

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 41, 76, 80, 82, 95, 152, 164, 190, 205, 304, 328, 331, 380, 410, 656, 662, 760, 779, 820, 1324, 1520, 1558, 1640, 1655, 2648, 3116, 3280, 3310, 3895, 5296, 6232, 6289, 6620, 7790, 12464, 12578, 13240, 13571, 15580, 25156, 26480, 27142, 31160, 31445, 50312, 54284, 62320, 62890, 67855, 100624, 108568, 125780, 135710, 217136, 251560, 257849, 271420, 503120, 515698, 542840, 1031396, 1085680, 1289245, 2062792, 2578490, 4125584, 5156980, 10313960, 20627920]

約数ペア:

[(1, 20627920), (2, 10313960), (4, 5156980), (5, 4125584), (8, 2578490), (10, 2062792), (16, 1289245), (19, 1085680), (20, 1031396), (38, 542840), (40, 515698), (41, 503120), (76, 271420), (80, 257849), (82, 251560), (95, 217136), (152, 135710), (164, 125780), (190, 108568), (205, 100624), (304, 67855), (328, 62890), (331, 62320), (380, 54284), (410, 50312), (656, 31445), (662, 31160), (760, 27142), (779, 26480), (820, 25156), (1324, 15580), (1520, 13571), (1558, 13240), (1640, 12578), (1655, 12464), (2648, 7790), (3116, 6620), (3280, 6289), (3310, 6232), (3895, 5296)]