20780375

素因数分解:

$5^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1$

素因数の和:177

約数の個数: 64

約数和(自身を含む): 34504704

約数和(自身を除く): 13724329

約数列:

[1, 5, 7, 11, 17, 25, 35, 55, 77, 85, 119, 125, 127, 175, 187, 275, 385, 425, 595, 635, 875, 889, 935, 1309, 1375, 1397, 1925, 2125, 2159, 2975, 3175, 4445, 4675, 6545, 6985, 9625, 9779, 10795, 14875, 15113, 15875, 22225, 23375, 23749, 32725, 34925, 48895, 53975, 75565, 111125, 118745, 163625, 166243, 174625, 244475, 269875, 377825, 593725, 831215, 1222375, 1889125, 2968625, 4156075, 20780375]

約数ペア:

[(1, 20780375), (5, 4156075), (7, 2968625), (11, 1889125), (17, 1222375), (25, 831215), (35, 593725), (55, 377825), (77, 269875), (85, 244475), (119, 174625), (125, 166243), (127, 163625), (175, 118745), (187, 111125), (275, 75565), (385, 53975), (425, 48895), (595, 34925), (635, 32725), (875, 23749), (889, 23375), (935, 22225), (1309, 15875), (1375, 15113), (1397, 14875), (1925, 10795), (2125, 9779), (2159, 9625), (2975, 6985), (3175, 6545), (4445, 4675)]