20421250

素因数分解:

$2^1\times 5^4\times {\mathrm{17}}^1\times {\mathrm{31}}^2$

素因数の和:101

約数の個数: 60

約数和(自身を含む): 41878782

約数和(自身を除く): 21457532

約数列:

[1, 2, 5, 10, 17, 25, 31, 34, 50, 62, 85, 125, 155, 170, 250, 310, 425, 527, 625, 775, 850, 961, 1054, 1250, 1550, 1922, 2125, 2635, 3875, 4250, 4805, 5270, 7750, 9610, 10625, 13175, 16337, 19375, 21250, 24025, 26350, 32674, 38750, 48050, 65875, 81685, 120125, 131750, 163370, 240250, 329375, 408425, 600625, 658750, 816850, 1201250, 2042125, 4084250, 10210625, 20421250]

約数ペア:

[(1, 20421250), (2, 10210625), (5, 4084250), (10, 2042125), (17, 1201250), (25, 816850), (31, 658750), (34, 600625), (50, 408425), (62, 329375), (85, 240250), (125, 163370), (155, 131750), (170, 120125), (250, 81685), (310, 65875), (425, 48050), (527, 38750), (625, 32674), (775, 26350), (850, 24025), (961, 21250), (1054, 19375), (1250, 16337), (1550, 13175), (1922, 10625), (2125, 9610), (2635, 7750), (3875, 5270), (4250, 4805)]