21450390

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{55001}}^1$

素因数の和:55024

約数の個数: 32

約数和(自身を含む): 55442016

約数和(自身を除く): 33991626

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 55001, 110002, 165003, 275005, 330006, 550010, 715013, 825015, 1430026, 1650030, 2145039, 3575065, 4290078, 7150130, 10725195, 21450390]

約数ペア:

[(1, 21450390), (2, 10725195), (3, 7150130), (5, 4290078), (6, 3575065), (10, 2145039), (13, 1650030), (15, 1430026), (26, 825015), (30, 715013), (39, 550010), (65, 330006), (78, 275005), (130, 165003), (195, 110002), (390, 55001)]