19904220

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{15797}}^1$

素因数の和:15819

約数の個数: 72

約数和(自身を含む): 69005664

約数和(自身を除く): 49101444

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 15797, 31594, 47391, 63188, 78985, 94782, 110579, 142173, 157970, 189564, 221158, 236955, 284346, 315940, 331737, 442316, 473910, 552895, 568692, 663474, 710865, 947820, 995211, 1105790, 1326948, 1421730, 1658685, 1990422, 2211580, 2843460, 3317370, 3980844, 4976055, 6634740, 9952110, 19904220]

約数ペア:

[(1, 19904220), (2, 9952110), (3, 6634740), (4, 4976055), (5, 3980844), (6, 3317370), (7, 2843460), (9, 2211580), (10, 1990422), (12, 1658685), (14, 1421730), (15, 1326948), (18, 1105790), (20, 995211), (21, 947820), (28, 710865), (30, 663474), (35, 568692), (36, 552895), (42, 473910), (45, 442316), (60, 331737), (63, 315940), (70, 284346), (84, 236955), (90, 221158), (105, 189564), (126, 157970), (140, 142173), (180, 110579), (210, 94782), (252, 78985), (315, 63188), (420, 47391), (630, 31594), (1260, 15797)]