15221000

素因数分解:

$2^3\times 5^3\times {\mathrm{31}}^1\times {\mathrm{491}}^1$

素因数の和:543

約数の個数: 64

約数和(自身を含む): 36840960

約数和(自身を除く): 21619960

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 50, 62, 100, 124, 125, 155, 200, 248, 250, 310, 491, 500, 620, 775, 982, 1000, 1240, 1550, 1964, 2455, 3100, 3875, 3928, 4910, 6200, 7750, 9820, 12275, 15221, 15500, 19640, 24550, 30442, 31000, 49100, 60884, 61375, 76105, 98200, 121768, 122750, 152210, 245500, 304420, 380525, 491000, 608840, 761050, 1522100, 1902625, 3044200, 3805250, 7610500, 15221000]

約数ペア:

[(1, 15221000), (2, 7610500), (4, 3805250), (5, 3044200), (8, 1902625), (10, 1522100), (20, 761050), (25, 608840), (31, 491000), (40, 380525), (50, 304420), (62, 245500), (100, 152210), (124, 122750), (125, 121768), (155, 98200), (200, 76105), (248, 61375), (250, 60884), (310, 49100), (491, 31000), (500, 30442), (620, 24550), (775, 19640), (982, 15500), (1000, 15221), (1240, 12275), (1550, 9820), (1964, 7750), (2455, 6200), (3100, 4910), (3875, 3928)]