20450560

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1229}}^1$

素因数の和:1263

約数の個数: 72

約数和(自身を含む): 52796520

約数和(自身を除く): 32345960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1229, 1280, 1664, 2080, 2458, 3328, 4160, 4916, 6145, 8320, 9832, 12290, 15977, 16640, 19664, 24580, 31954, 39328, 49160, 63908, 78656, 79885, 98320, 127816, 157312, 159770, 196640, 255632, 314624, 319540, 393280, 511264, 639080, 786560, 1022528, 1278160, 1573120, 2045056, 2556320, 4090112, 5112640, 10225280, 20450560]

約数ペア:

[(1, 20450560), (2, 10225280), (4, 5112640), (5, 4090112), (8, 2556320), (10, 2045056), (13, 1573120), (16, 1278160), (20, 1022528), (26, 786560), (32, 639080), (40, 511264), (52, 393280), (64, 319540), (65, 314624), (80, 255632), (104, 196640), (128, 159770), (130, 157312), (160, 127816), (208, 98320), (256, 79885), (260, 78656), (320, 63908), (416, 49160), (520, 39328), (640, 31954), (832, 24580), (1040, 19664), (1229, 16640), (1280, 15977), (1664, 12290), (2080, 9832), (2458, 8320), (3328, 6145), (4160, 4916)]