21498965

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7531435

約数列:

[1, 5, 17, 31, 41, 85, 155, 199, 205, 527, 697, 995, 1271, 2635, 3383, 3485, 6169, 6355, 8159, 16915, 21607, 30845, 40795, 104873, 108035, 138703, 252929, 524365, 693515, 1264645, 4299793, 21498965]

約数ペア:

[(1, 21498965), (5, 4299793), (17, 1264645), (31, 693515), (41, 524365), (85, 252929), (155, 138703), (199, 108035), (205, 104873), (527, 40795), (697, 30845), (995, 21607), (1271, 16915), (2635, 8159), (3383, 6355), (3485, 6169)]