201221000

素因数分解:

$2^3\times 5^3\times {\mathrm{31}}^1\times {\mathrm{6491}}^1$

素因数の和:6543

約数の個数: 64

約数和(自身を含む): 486120960

約数和(自身を除く): 284899960

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 50, 62, 100, 124, 125, 155, 200, 248, 250, 310, 500, 620, 775, 1000, 1240, 1550, 3100, 3875, 6200, 6491, 7750, 12982, 15500, 25964, 31000, 32455, 51928, 64910, 129820, 162275, 201221, 259640, 324550, 402442, 649100, 804884, 811375, 1006105, 1298200, 1609768, 1622750, 2012210, 3245500, 4024420, 5030525, 6491000, 8048840, 10061050, 20122100, 25152625, 40244200, 50305250, 100610500, 201221000]

約数ペア:

[(1, 201221000), (2, 100610500), (4, 50305250), (5, 40244200), (8, 25152625), (10, 20122100), (20, 10061050), (25, 8048840), (31, 6491000), (40, 5030525), (50, 4024420), (62, 3245500), (100, 2012210), (124, 1622750), (125, 1609768), (155, 1298200), (200, 1006105), (248, 811375), (250, 804884), (310, 649100), (500, 402442), (620, 324550), (775, 259640), (1000, 201221), (1240, 162275), (1550, 129820), (3100, 64910), (3875, 51928), (6200, 32455), (6491, 31000), (7750, 25964), (12982, 15500)]