19771875

素因数分解:

$3^2\times 5^5\times {\mathrm{19}}^1\times {\mathrm{37}}^1$

素因数の和:87

約数の個数: 72

約数和(自身を含む): 38591280

約数和(自身を除く): 18819405

約数列:

[1, 3, 5, 9, 15, 19, 25, 37, 45, 57, 75, 95, 111, 125, 171, 185, 225, 285, 333, 375, 475, 555, 625, 703, 855, 925, 1125, 1425, 1665, 1875, 2109, 2375, 2775, 3125, 3515, 4275, 4625, 5625, 6327, 7125, 8325, 9375, 10545, 11875, 13875, 17575, 21375, 23125, 28125, 31635, 35625, 41625, 52725, 59375, 69375, 87875, 106875, 115625, 158175, 178125, 208125, 263625, 346875, 439375, 534375, 790875, 1040625, 1318125, 2196875, 3954375, 6590625, 19771875]

約数ペア:

[(1, 19771875), (3, 6590625), (5, 3954375), (9, 2196875), (15, 1318125), (19, 1040625), (25, 790875), (37, 534375), (45, 439375), (57, 346875), (75, 263625), (95, 208125), (111, 178125), (125, 158175), (171, 115625), (185, 106875), (225, 87875), (285, 69375), (333, 59375), (375, 52725), (475, 41625), (555, 35625), (625, 31635), (703, 28125), (855, 23125), (925, 21375), (1125, 17575), (1425, 13875), (1665, 11875), (1875, 10545), (2109, 9375), (2375, 8325), (2775, 7125), (3125, 6327), (3515, 5625), (4275, 4625)]