18910000

素因数分解:

$2^4\times 5^4\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:120

約数の個数: 100

約数和(自身を含む): 48034624

約数和(自身を除く): 29124624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 50, 61, 62, 80, 100, 122, 124, 125, 155, 200, 244, 248, 250, 305, 310, 400, 488, 496, 500, 610, 620, 625, 775, 976, 1000, 1220, 1240, 1250, 1525, 1550, 1891, 2000, 2440, 2480, 2500, 3050, 3100, 3782, 3875, 4880, 5000, 6100, 6200, 7564, 7625, 7750, 9455, 10000, 12200, 12400, 15128, 15250, 15500, 18910, 19375, 24400, 30256, 30500, 31000, 37820, 38125, 38750, 47275, 61000, 62000, 75640, 76250, 77500, 94550, 122000, 151280, 152500, 155000, 189100, 236375, 305000, 310000, 378200, 472750, 610000, 756400, 945500, 1181875, 1891000, 2363750, 3782000, 4727500, 9455000, 18910000]

約数ペア:

[(1, 18910000), (2, 9455000), (4, 4727500), (5, 3782000), (8, 2363750), (10, 1891000), (16, 1181875), (20, 945500), (25, 756400), (31, 610000), (40, 472750), (50, 378200), (61, 310000), (62, 305000), (80, 236375), (100, 189100), (122, 155000), (124, 152500), (125, 151280), (155, 122000), (200, 94550), (244, 77500), (248, 76250), (250, 75640), (305, 62000), (310, 61000), (400, 47275), (488, 38750), (496, 38125), (500, 37820), (610, 31000), (620, 30500), (625, 30256), (775, 24400), (976, 19375), (1000, 18910), (1220, 15500), (1240, 15250), (1250, 15128), (1525, 12400), (1550, 12200), (1891, 10000), (2000, 9455), (2440, 7750), (2480, 7625), (2500, 7564), (3050, 6200), (3100, 6100), (3782, 5000), (3875, 4880)]