20489710000

素因数分解:

$2^4\times 5^4\times {\mathrm{131}}^1\times {\mathrm{15641}}^1$

素因数の和:15800

約数の個数: 100

約数和(自身を含む): 49989516984

約数和(自身を除く): 29499806984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 131, 200, 250, 262, 400, 500, 524, 625, 655, 1000, 1048, 1250, 1310, 2000, 2096, 2500, 2620, 3275, 5000, 5240, 6550, 10000, 10480, 13100, 15641, 16375, 26200, 31282, 32750, 52400, 62564, 65500, 78205, 81875, 125128, 131000, 156410, 163750, 250256, 262000, 312820, 327500, 391025, 625640, 655000, 782050, 1251280, 1310000, 1564100, 1955125, 2048971, 3128200, 3910250, 4097942, 6256400, 7820500, 8195884, 9775625, 10244855, 15641000, 16391768, 19551250, 20489710, 31282000, 32783536, 39102500, 40979420, 51224275, 78205000, 81958840, 102448550, 156410000, 163917680, 204897100, 256121375, 409794200, 512242750, 819588400, 1024485500, 1280606875, 2048971000, 2561213750, 4097942000, 5122427500, 10244855000, 20489710000]

約数ペア:

[(1, 20489710000), (2, 10244855000), (4, 5122427500), (5, 4097942000), (8, 2561213750), (10, 2048971000), (16, 1280606875), (20, 1024485500), (25, 819588400), (40, 512242750), (50, 409794200), (80, 256121375), (100, 204897100), (125, 163917680), (131, 156410000), (200, 102448550), (250, 81958840), (262, 78205000), (400, 51224275), (500, 40979420), (524, 39102500), (625, 32783536), (655, 31282000), (1000, 20489710), (1048, 19551250), (1250, 16391768), (1310, 15641000), (2000, 10244855), (2096, 9775625), (2500, 8195884), (2620, 7820500), (3275, 6256400), (5000, 4097942), (5240, 3910250), (6550, 3128200), (10000, 2048971), (10480, 1955125), (13100, 1564100), (15641, 1310000), (16375, 1251280), (26200, 782050), (31282, 655000), (32750, 625640), (52400, 391025), (62564, 327500), (65500, 312820), (78205, 262000), (81875, 250256), (125128, 163750), (131000, 156410)]