21319440

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{211}}^1\times {\mathrm{421}}^1$

素因数の和:648

約数の個数: 80

約数和(自身を含む): 66561216

約数和(自身を除く): 45241776

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 211, 240, 421, 422, 633, 842, 844, 1055, 1263, 1266, 1684, 1688, 2105, 2110, 2526, 2532, 3165, 3368, 3376, 4210, 4220, 5052, 5064, 6315, 6330, 6736, 8420, 8440, 10104, 10128, 12630, 12660, 16840, 16880, 20208, 25260, 25320, 33680, 50520, 50640, 88831, 101040, 177662, 266493, 355324, 444155, 532986, 710648, 888310, 1065972, 1332465, 1421296, 1776620, 2131944, 2664930, 3553240, 4263888, 5329860, 7106480, 10659720, 21319440]

約数ペア:

[(1, 21319440), (2, 10659720), (3, 7106480), (4, 5329860), (5, 4263888), (6, 3553240), (8, 2664930), (10, 2131944), (12, 1776620), (15, 1421296), (16, 1332465), (20, 1065972), (24, 888310), (30, 710648), (40, 532986), (48, 444155), (60, 355324), (80, 266493), (120, 177662), (211, 101040), (240, 88831), (421, 50640), (422, 50520), (633, 33680), (842, 25320), (844, 25260), (1055, 20208), (1263, 16880), (1266, 16840), (1684, 12660), (1688, 12630), (2105, 10128), (2110, 10104), (2526, 8440), (2532, 8420), (3165, 6736), (3368, 6330), (3376, 6315), (4210, 5064), (4220, 5052)]