20457540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1277}}^1$

素因数の和:1381

約数の個数: 72

約数和(自身を含む): 62800920

約数和(自身を除く): 42343380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 89, 90, 178, 180, 267, 356, 445, 534, 801, 890, 1068, 1277, 1335, 1602, 1780, 2554, 2670, 3204, 3831, 4005, 5108, 5340, 6385, 7662, 8010, 11493, 12770, 15324, 16020, 19155, 22986, 25540, 38310, 45972, 57465, 76620, 113653, 114930, 227306, 229860, 340959, 454612, 568265, 681918, 1022877, 1136530, 1363836, 1704795, 2045754, 2273060, 3409590, 4091508, 5114385, 6819180, 10228770, 20457540]

約数ペア:

[(1, 20457540), (2, 10228770), (3, 6819180), (4, 5114385), (5, 4091508), (6, 3409590), (9, 2273060), (10, 2045754), (12, 1704795), (15, 1363836), (18, 1136530), (20, 1022877), (30, 681918), (36, 568265), (45, 454612), (60, 340959), (89, 229860), (90, 227306), (178, 114930), (180, 113653), (267, 76620), (356, 57465), (445, 45972), (534, 38310), (801, 25540), (890, 22986), (1068, 19155), (1277, 16020), (1335, 15324), (1602, 12770), (1780, 11493), (2554, 8010), (2670, 7662), (3204, 6385), (3831, 5340), (4005, 5108)]