19001900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:243

約数の個数: 72

約数和(自身を含む): 44320080

約数和(自身を除く): 25318180

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 73, 76, 95, 100, 137, 146, 190, 274, 292, 365, 380, 475, 548, 685, 730, 950, 1370, 1387, 1460, 1825, 1900, 2603, 2740, 2774, 3425, 3650, 5206, 5548, 6850, 6935, 7300, 10001, 10412, 13015, 13700, 13870, 20002, 26030, 27740, 34675, 40004, 50005, 52060, 65075, 69350, 100010, 130150, 138700, 190019, 200020, 250025, 260300, 380038, 500050, 760076, 950095, 1000100, 1900190, 3800380, 4750475, 9500950, 19001900]

約数ペア:

[(1, 19001900), (2, 9500950), (4, 4750475), (5, 3800380), (10, 1900190), (19, 1000100), (20, 950095), (25, 760076), (38, 500050), (50, 380038), (73, 260300), (76, 250025), (95, 200020), (100, 190019), (137, 138700), (146, 130150), (190, 100010), (274, 69350), (292, 65075), (365, 52060), (380, 50005), (475, 40004), (548, 34675), (685, 27740), (730, 26030), (950, 20002), (1370, 13870), (1387, 13700), (1460, 13015), (1825, 10412), (1900, 10001), (2603, 7300), (2740, 6935), (2774, 6850), (3425, 5548), (3650, 5206)]