21305440

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10243}}^1$

素因数の和:10271

約数の個数: 48

約数和(自身を含む): 54211248

約数和(自身を除く): 32905808

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10243, 20486, 40972, 51215, 81944, 102430, 133159, 163888, 204860, 266318, 327776, 409720, 532636, 665795, 819440, 1065272, 1331590, 1638880, 2130544, 2663180, 4261088, 5326360, 10652720, 21305440]

約数ペア:

[(1, 21305440), (2, 10652720), (4, 5326360), (5, 4261088), (8, 2663180), (10, 2130544), (13, 1638880), (16, 1331590), (20, 1065272), (26, 819440), (32, 665795), (40, 532636), (52, 409720), (65, 327776), (80, 266318), (104, 204860), (130, 163888), (160, 133159), (208, 102430), (260, 81944), (416, 51215), (520, 40972), (1040, 20486), (2080, 10243)]