21151750

素因数分解:

$2^1\times 5^3\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:170

約数の個数: 64

約数和(自身を含む): 42943680

約数和(自身を除く): 21791930

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 61, 73, 95, 122, 125, 146, 190, 250, 305, 365, 475, 610, 730, 950, 1159, 1387, 1525, 1825, 2318, 2375, 2774, 3050, 3650, 4453, 4750, 5795, 6935, 7625, 8906, 9125, 11590, 13870, 15250, 18250, 22265, 28975, 34675, 44530, 57950, 69350, 84607, 111325, 144875, 169214, 173375, 222650, 289750, 346750, 423035, 556625, 846070, 1113250, 2115175, 4230350, 10575875, 21151750]

約数ペア:

[(1, 21151750), (2, 10575875), (5, 4230350), (10, 2115175), (19, 1113250), (25, 846070), (38, 556625), (50, 423035), (61, 346750), (73, 289750), (95, 222650), (122, 173375), (125, 169214), (146, 144875), (190, 111325), (250, 84607), (305, 69350), (365, 57950), (475, 44530), (610, 34675), (730, 28975), (950, 22265), (1159, 18250), (1387, 15250), (1525, 13870), (1825, 11590), (2318, 9125), (2375, 8906), (2774, 7625), (3050, 6935), (3650, 5795), (4453, 4750)]