20128850

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{17}}^2\times {\mathrm{199}}^1$

素因数の和:252

約数の個数: 72

約数和(自身を含む): 45681600

約数和(自身を除く): 25552750

約数列:

[1, 2, 5, 7, 10, 14, 17, 25, 34, 35, 50, 70, 85, 119, 170, 175, 199, 238, 289, 350, 398, 425, 578, 595, 850, 995, 1190, 1393, 1445, 1990, 2023, 2786, 2890, 2975, 3383, 4046, 4975, 5950, 6766, 6965, 7225, 9950, 10115, 13930, 14450, 16915, 20230, 23681, 33830, 34825, 47362, 50575, 57511, 69650, 84575, 101150, 115022, 118405, 169150, 236810, 287555, 402577, 575110, 592025, 805154, 1184050, 1437775, 2012885, 2875550, 4025770, 10064425, 20128850]

約数ペア:

[(1, 20128850), (2, 10064425), (5, 4025770), (7, 2875550), (10, 2012885), (14, 1437775), (17, 1184050), (25, 805154), (34, 592025), (35, 575110), (50, 402577), (70, 287555), (85, 236810), (119, 169150), (170, 118405), (175, 115022), (199, 101150), (238, 84575), (289, 69650), (350, 57511), (398, 50575), (425, 47362), (578, 34825), (595, 33830), (850, 23681), (995, 20230), (1190, 16915), (1393, 14450), (1445, 13930), (1990, 10115), (2023, 9950), (2786, 7225), (2890, 6965), (2975, 6766), (3383, 5950), (4046, 4975)]