19807450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{983}}^1$

素因数の和:1039

約数の個数: 48

約数和(自身を含む): 40997376

約数和(自身を除く): 21189926

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 50, 62, 65, 130, 155, 310, 325, 403, 650, 775, 806, 983, 1550, 1966, 2015, 4030, 4915, 9830, 10075, 12779, 20150, 24575, 25558, 30473, 49150, 60946, 63895, 127790, 152365, 304730, 319475, 396149, 638950, 761825, 792298, 1523650, 1980745, 3961490, 9903725, 19807450]

約数ペア:

[(1, 19807450), (2, 9903725), (5, 3961490), (10, 1980745), (13, 1523650), (25, 792298), (26, 761825), (31, 638950), (50, 396149), (62, 319475), (65, 304730), (130, 152365), (155, 127790), (310, 63895), (325, 60946), (403, 49150), (650, 30473), (775, 25558), (806, 24575), (983, 20150), (1550, 12779), (1966, 10075), (2015, 9830), (4030, 4915)]