20419750

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1$

素因数の和:194

約数の個数: 64

約数和(自身を含む): 42247296

約数和(自身を除く): 21827546

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 61, 65, 103, 122, 125, 130, 206, 250, 305, 325, 515, 610, 650, 793, 1030, 1339, 1525, 1586, 1625, 2575, 2678, 3050, 3250, 3965, 5150, 6283, 6695, 7625, 7930, 12566, 12875, 13390, 15250, 19825, 25750, 31415, 33475, 39650, 62830, 66950, 81679, 99125, 157075, 163358, 167375, 198250, 314150, 334750, 408395, 785375, 816790, 1570750, 2041975, 4083950, 10209875, 20419750]

約数ペア:

[(1, 20419750), (2, 10209875), (5, 4083950), (10, 2041975), (13, 1570750), (25, 816790), (26, 785375), (50, 408395), (61, 334750), (65, 314150), (103, 198250), (122, 167375), (125, 163358), (130, 157075), (206, 99125), (250, 81679), (305, 66950), (325, 62830), (515, 39650), (610, 33475), (650, 31415), (793, 25750), (1030, 19825), (1339, 15250), (1525, 13390), (1586, 12875), (1625, 12566), (2575, 7930), (2678, 7625), (3050, 6695), (3250, 6283), (3965, 5150)]