21484840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{523}}^1$

素因数の和:626

約数の個数: 64

約数和(自身を含む): 52819200

約数和(自身を除く): 31334360

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 79, 104, 130, 158, 260, 316, 395, 520, 523, 632, 790, 1027, 1046, 1580, 2054, 2092, 2615, 3160, 4108, 4184, 5135, 5230, 6799, 8216, 10270, 10460, 13598, 20540, 20920, 27196, 33995, 41080, 41317, 54392, 67990, 82634, 135980, 165268, 206585, 271960, 330536, 413170, 537121, 826340, 1074242, 1652680, 2148484, 2685605, 4296968, 5371210, 10742420, 21484840]

約数ペア:

[(1, 21484840), (2, 10742420), (4, 5371210), (5, 4296968), (8, 2685605), (10, 2148484), (13, 1652680), (20, 1074242), (26, 826340), (40, 537121), (52, 413170), (65, 330536), (79, 271960), (104, 206585), (130, 165268), (158, 135980), (260, 82634), (316, 67990), (395, 54392), (520, 41317), (523, 41080), (632, 33995), (790, 27196), (1027, 20920), (1046, 20540), (1580, 13598), (2054, 10460), (2092, 10270), (2615, 8216), (3160, 6799), (4108, 5230), (4184, 5135)]