20653750

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:107

約数の個数: 80

約数和(自身を含む): 44085888

約数和(自身を除く): 23432138

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 41, 50, 62, 65, 82, 125, 130, 155, 205, 250, 310, 325, 403, 410, 533, 625, 650, 775, 806, 1025, 1066, 1250, 1271, 1550, 1625, 2015, 2050, 2542, 2665, 3250, 3875, 4030, 5125, 5330, 6355, 7750, 8125, 10075, 10250, 12710, 13325, 16250, 16523, 19375, 20150, 25625, 26650, 31775, 33046, 38750, 50375, 51250, 63550, 66625, 82615, 100750, 133250, 158875, 165230, 251875, 317750, 333125, 413075, 503750, 666250, 794375, 826150, 1588750, 2065375, 4130750, 10326875, 20653750]

約数ペア:

[(1, 20653750), (2, 10326875), (5, 4130750), (10, 2065375), (13, 1588750), (25, 826150), (26, 794375), (31, 666250), (41, 503750), (50, 413075), (62, 333125), (65, 317750), (82, 251875), (125, 165230), (130, 158875), (155, 133250), (205, 100750), (250, 82615), (310, 66625), (325, 63550), (403, 51250), (410, 50375), (533, 38750), (625, 33046), (650, 31775), (775, 26650), (806, 25625), (1025, 20150), (1066, 19375), (1250, 16523), (1271, 16250), (1550, 13325), (1625, 12710), (2015, 10250), (2050, 10075), (2542, 8125), (2665, 7750), (3250, 6355), (3875, 5330), (4030, 5125)]