20438775

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{683}}^1$

素因数の和:725

約数の個数: 72

約数和(自身を含む): 44104320

約数和(自身を除く): 23665545

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 25, 35, 45, 57, 63, 75, 95, 105, 133, 171, 175, 225, 285, 315, 399, 475, 525, 665, 683, 855, 1197, 1425, 1575, 1995, 2049, 3325, 3415, 4275, 4781, 5985, 6147, 9975, 10245, 12977, 14343, 17075, 23905, 29925, 30735, 38931, 43029, 51225, 64885, 71715, 90839, 116793, 119525, 153675, 194655, 215145, 272517, 324425, 358575, 454195, 583965, 817551, 973275, 1075725, 1362585, 2270975, 2919825, 4087755, 6812925, 20438775]

約数ペア:

[(1, 20438775), (3, 6812925), (5, 4087755), (7, 2919825), (9, 2270975), (15, 1362585), (19, 1075725), (21, 973275), (25, 817551), (35, 583965), (45, 454195), (57, 358575), (63, 324425), (75, 272517), (95, 215145), (105, 194655), (133, 153675), (171, 119525), (175, 116793), (225, 90839), (285, 71715), (315, 64885), (399, 51225), (475, 43029), (525, 38931), (665, 30735), (683, 29925), (855, 23905), (1197, 17075), (1425, 14343), (1575, 12977), (1995, 10245), (2049, 9975), (3325, 6147), (3415, 5985), (4275, 4781)]