64940720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1523}}^1$

素因数の和:1590

約数の個数: 80

約数和(自身を含む): 166676832

約数和(自身を除く): 101736112

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 130, 164, 205, 208, 260, 328, 410, 520, 533, 656, 820, 1040, 1066, 1523, 1640, 2132, 2665, 3046, 3280, 4264, 5330, 6092, 7615, 8528, 10660, 12184, 15230, 19799, 21320, 24368, 30460, 39598, 42640, 60920, 62443, 79196, 98995, 121840, 124886, 158392, 197990, 249772, 312215, 316784, 395980, 499544, 624430, 791960, 811759, 999088, 1248860, 1583920, 1623518, 2497720, 3247036, 4058795, 4995440, 6494072, 8117590, 12988144, 16235180, 32470360, 64940720]

約数ペア:

[(1, 64940720), (2, 32470360), (4, 16235180), (5, 12988144), (8, 8117590), (10, 6494072), (13, 4995440), (16, 4058795), (20, 3247036), (26, 2497720), (40, 1623518), (41, 1583920), (52, 1248860), (65, 999088), (80, 811759), (82, 791960), (104, 624430), (130, 499544), (164, 395980), (205, 316784), (208, 312215), (260, 249772), (328, 197990), (410, 158392), (520, 124886), (533, 121840), (656, 98995), (820, 79196), (1040, 62443), (1066, 60920), (1523, 42640), (1640, 39598), (2132, 30460), (2665, 24368), (3046, 21320), (3280, 19799), (4264, 15230), (5330, 12184), (6092, 10660), (7615, 8528)]