21156780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{15331}}^1$

素因数の和:15366

約数の個数: 48

約数和(自身を含む): 61818624

約数和(自身を除く): 40661844

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 230, 276, 345, 460, 690, 1380, 15331, 30662, 45993, 61324, 76655, 91986, 153310, 183972, 229965, 306620, 352613, 459930, 705226, 919860, 1057839, 1410452, 1763065, 2115678, 3526130, 4231356, 5289195, 7052260, 10578390, 21156780]

約数ペア:

[(1, 21156780), (2, 10578390), (3, 7052260), (4, 5289195), (5, 4231356), (6, 3526130), (10, 2115678), (12, 1763065), (15, 1410452), (20, 1057839), (23, 919860), (30, 705226), (46, 459930), (60, 352613), (69, 306620), (92, 229965), (115, 183972), (138, 153310), (230, 91986), (276, 76655), (345, 61324), (460, 45993), (690, 30662), (1380, 15331)]