20568780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{229}}^1\times {\mathrm{499}}^1$

素因数の和:743

約数の個数: 72

約数和(自身を含む): 62790000

約数和(自身を除く): 42221220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 229, 458, 499, 687, 916, 998, 1145, 1374, 1497, 1996, 2061, 2290, 2495, 2748, 2994, 3435, 4122, 4491, 4580, 4990, 5988, 6870, 7485, 8244, 8982, 9980, 10305, 13740, 14970, 17964, 20610, 22455, 29940, 41220, 44910, 89820, 114271, 228542, 342813, 457084, 571355, 685626, 1028439, 1142710, 1371252, 1714065, 2056878, 2285420, 3428130, 4113756, 5142195, 6856260, 10284390, 20568780]

約数ペア:

[(1, 20568780), (2, 10284390), (3, 6856260), (4, 5142195), (5, 4113756), (6, 3428130), (9, 2285420), (10, 2056878), (12, 1714065), (15, 1371252), (18, 1142710), (20, 1028439), (30, 685626), (36, 571355), (45, 457084), (60, 342813), (90, 228542), (180, 114271), (229, 89820), (458, 44910), (499, 41220), (687, 29940), (916, 22455), (998, 20610), (1145, 17964), (1374, 14970), (1497, 13740), (1996, 10305), (2061, 9980), (2290, 8982), (2495, 8244), (2748, 7485), (2994, 6870), (3435, 5988), (4122, 4990), (4491, 4580)]