21530000

素因数分解:

$2^4\times 5^4\times {\mathrm{2153}}^1$

素因数の和:2181

約数の個数: 50

約数和(自身を含む): 52150494

約数和(自身を除く): 30620494

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2153, 2500, 4306, 5000, 8612, 10000, 10765, 17224, 21530, 34448, 43060, 53825, 86120, 107650, 172240, 215300, 269125, 430600, 538250, 861200, 1076500, 1345625, 2153000, 2691250, 4306000, 5382500, 10765000, 21530000]

約数ペア:

[(1, 21530000), (2, 10765000), (4, 5382500), (5, 4306000), (8, 2691250), (10, 2153000), (16, 1345625), (20, 1076500), (25, 861200), (40, 538250), (50, 430600), (80, 269125), (100, 215300), (125, 172240), (200, 107650), (250, 86120), (400, 53825), (500, 43060), (625, 34448), (1000, 21530), (1250, 17224), (2000, 10765), (2153, 10000), (2500, 8612), (4306, 5000)]