20861450

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:399

約数の個数: 48

約数和(自身を含む): 41116416

約数和(自身を除く): 20254966

約数列:

[1, 2, 5, 10, 25, 31, 43, 50, 62, 86, 155, 215, 310, 313, 430, 626, 775, 1075, 1333, 1550, 1565, 2150, 2666, 3130, 6665, 7825, 9703, 13330, 13459, 15650, 19406, 26918, 33325, 48515, 66650, 67295, 97030, 134590, 242575, 336475, 417229, 485150, 672950, 834458, 2086145, 4172290, 10430725, 20861450]

約数ペア:

[(1, 20861450), (2, 10430725), (5, 4172290), (10, 2086145), (25, 834458), (31, 672950), (43, 485150), (50, 417229), (62, 336475), (86, 242575), (155, 134590), (215, 97030), (310, 67295), (313, 66650), (430, 48515), (626, 33325), (775, 26918), (1075, 19406), (1333, 15650), (1550, 13459), (1565, 13330), (2150, 9703), (2666, 7825), (3130, 6665)]