20506700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:327

約数の個数: 72

約数和(自身を含む): 48121920

約数和(自身を除く): 27615220

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 43, 50, 76, 86, 95, 100, 172, 190, 215, 251, 380, 430, 475, 502, 817, 860, 950, 1004, 1075, 1255, 1634, 1900, 2150, 2510, 3268, 4085, 4300, 4769, 5020, 6275, 8170, 9538, 10793, 12550, 16340, 19076, 20425, 21586, 23845, 25100, 40850, 43172, 47690, 53965, 81700, 95380, 107930, 119225, 205067, 215860, 238450, 269825, 410134, 476900, 539650, 820268, 1025335, 1079300, 2050670, 4101340, 5126675, 10253350, 20506700]

約数ペア:

[(1, 20506700), (2, 10253350), (4, 5126675), (5, 4101340), (10, 2050670), (19, 1079300), (20, 1025335), (25, 820268), (38, 539650), (43, 476900), (50, 410134), (76, 269825), (86, 238450), (95, 215860), (100, 205067), (172, 119225), (190, 107930), (215, 95380), (251, 81700), (380, 53965), (430, 47690), (475, 43172), (502, 40850), (817, 25100), (860, 23845), (950, 21586), (1004, 20425), (1075, 19076), (1255, 16340), (1634, 12550), (1900, 10793), (2150, 9538), (2510, 8170), (3268, 6275), (4085, 5020), (4300, 4769)]