21661250

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:109

約数の個数: 80

約数和(自身を含む): 46185216

約数和(自身を除く): 24523966

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 43, 50, 62, 65, 86, 125, 130, 155, 215, 250, 310, 325, 403, 430, 559, 625, 650, 775, 806, 1075, 1118, 1250, 1333, 1550, 1625, 2015, 2150, 2666, 2795, 3250, 3875, 4030, 5375, 5590, 6665, 7750, 8125, 10075, 10750, 13330, 13975, 16250, 17329, 19375, 20150, 26875, 27950, 33325, 34658, 38750, 50375, 53750, 66650, 69875, 86645, 100750, 139750, 166625, 173290, 251875, 333250, 349375, 433225, 503750, 698750, 833125, 866450, 1666250, 2166125, 4332250, 10830625, 21661250]

約数ペア:

[(1, 21661250), (2, 10830625), (5, 4332250), (10, 2166125), (13, 1666250), (25, 866450), (26, 833125), (31, 698750), (43, 503750), (50, 433225), (62, 349375), (65, 333250), (86, 251875), (125, 173290), (130, 166625), (155, 139750), (215, 100750), (250, 86645), (310, 69875), (325, 66650), (403, 53750), (430, 50375), (559, 38750), (625, 34658), (650, 33325), (775, 27950), (806, 26875), (1075, 20150), (1118, 19375), (1250, 17329), (1333, 16250), (1550, 13975), (1625, 13330), (2015, 10750), (2150, 10075), (2666, 8125), (2795, 7750), (3250, 6665), (3875, 5590), (4030, 5375)]