21738220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:239

約数の個数: 96

約数和(自身を含む): 56060928

約数和(自身を除く): 34322708

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 43, 46, 70, 86, 92, 115, 140, 157, 161, 172, 215, 230, 301, 314, 322, 430, 460, 602, 628, 644, 785, 805, 860, 989, 1099, 1204, 1505, 1570, 1610, 1978, 2198, 3010, 3140, 3220, 3611, 3956, 4396, 4945, 5495, 6020, 6751, 6923, 7222, 9890, 10990, 13502, 13846, 14444, 18055, 19780, 21980, 25277, 27004, 27692, 33755, 34615, 36110, 47257, 50554, 67510, 69230, 72220, 94514, 101108, 126385, 135020, 138460, 155273, 189028, 236285, 252770, 310546, 472570, 505540, 621092, 776365, 945140, 1086911, 1552730, 2173822, 3105460, 4347644, 5434555, 10869110, 21738220]

約数ペア:

[(1, 21738220), (2, 10869110), (4, 5434555), (5, 4347644), (7, 3105460), (10, 2173822), (14, 1552730), (20, 1086911), (23, 945140), (28, 776365), (35, 621092), (43, 505540), (46, 472570), (70, 310546), (86, 252770), (92, 236285), (115, 189028), (140, 155273), (157, 138460), (161, 135020), (172, 126385), (215, 101108), (230, 94514), (301, 72220), (314, 69230), (322, 67510), (430, 50554), (460, 47257), (602, 36110), (628, 34615), (644, 33755), (785, 27692), (805, 27004), (860, 25277), (989, 21980), (1099, 19780), (1204, 18055), (1505, 14444), (1570, 13846), (1610, 13502), (1978, 10990), (2198, 9890), (3010, 7222), (3140, 6923), (3220, 6751), (3611, 6020), (3956, 5495), (4396, 4945)]