20749540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{683}}^1$

素因数の和:737

約数の個数: 72

約数和(自身を含む): 52399872

約数和(自身を除く): 31650332

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 98, 124, 140, 155, 196, 217, 245, 310, 434, 490, 620, 683, 868, 980, 1085, 1366, 1519, 2170, 2732, 3038, 3415, 4340, 4781, 6076, 6830, 7595, 9562, 13660, 15190, 19124, 21173, 23905, 30380, 33467, 42346, 47810, 66934, 84692, 95620, 105865, 133868, 148211, 167335, 211730, 296422, 334670, 423460, 592844, 669340, 741055, 1037477, 1482110, 2074954, 2964220, 4149908, 5187385, 10374770, 20749540]

約数ペア:

[(1, 20749540), (2, 10374770), (4, 5187385), (5, 4149908), (7, 2964220), (10, 2074954), (14, 1482110), (20, 1037477), (28, 741055), (31, 669340), (35, 592844), (49, 423460), (62, 334670), (70, 296422), (98, 211730), (124, 167335), (140, 148211), (155, 133868), (196, 105865), (217, 95620), (245, 84692), (310, 66934), (434, 47810), (490, 42346), (620, 33467), (683, 30380), (868, 23905), (980, 21173), (1085, 19124), (1366, 15190), (1519, 13660), (2170, 9562), (2732, 7595), (3038, 6830), (3415, 6076), (4340, 4781)]