90242780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{431}}^1$

素因数の和:507

約数の個数: 72

約数和(自身を含む): 207385920

約数和(自身を除く): 117143140

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 76, 95, 116, 145, 190, 290, 361, 380, 431, 551, 580, 722, 862, 1102, 1444, 1724, 1805, 2155, 2204, 2755, 3610, 4310, 5510, 7220, 8189, 8620, 10469, 11020, 12499, 16378, 20938, 24998, 32756, 40945, 41876, 49996, 52345, 62495, 81890, 104690, 124990, 155591, 163780, 209380, 237481, 249980, 311182, 474962, 622364, 777955, 949924, 1187405, 1555910, 2374810, 3111820, 4512139, 4749620, 9024278, 18048556, 22560695, 45121390, 90242780]

約数ペア:

[(1, 90242780), (2, 45121390), (4, 22560695), (5, 18048556), (10, 9024278), (19, 4749620), (20, 4512139), (29, 3111820), (38, 2374810), (58, 1555910), (76, 1187405), (95, 949924), (116, 777955), (145, 622364), (190, 474962), (290, 311182), (361, 249980), (380, 237481), (431, 209380), (551, 163780), (580, 155591), (722, 124990), (862, 104690), (1102, 81890), (1444, 62495), (1724, 52345), (1805, 49996), (2155, 41876), (2204, 40945), (2755, 32756), (3610, 24998), (4310, 20938), (5510, 16378), (7220, 12499), (8189, 11020), (8620, 10469)]