21101216

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{491}}^1$

素因数の和:597

約数の個数: 48

約数和(自身を含む): 44634240

約数和(自身を除く): 23533024

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 79, 136, 158, 272, 316, 491, 544, 632, 982, 1264, 1343, 1964, 2528, 2686, 3928, 5372, 7856, 8347, 10744, 15712, 16694, 21488, 33388, 38789, 42976, 66776, 77578, 133552, 155156, 267104, 310312, 620624, 659413, 1241248, 1318826, 2637652, 5275304, 10550608, 21101216]

約数ペア:

[(1, 21101216), (2, 10550608), (4, 5275304), (8, 2637652), (16, 1318826), (17, 1241248), (32, 659413), (34, 620624), (68, 310312), (79, 267104), (136, 155156), (158, 133552), (272, 77578), (316, 66776), (491, 42976), (544, 38789), (632, 33388), (982, 21488), (1264, 16694), (1343, 15712), (1964, 10744), (2528, 8347), (2686, 7856), (3928, 5372)]