21006428720

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{883}}^1\times {\mathrm{7253}}^1$

素因数の和:8190

約数の個数: 80

約数和(自身を含む): 50094731232

約数和(自身を除く): 29088302512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 883, 1640, 1766, 3280, 3532, 4415, 7064, 7253, 8830, 14128, 14506, 17660, 29012, 35320, 36203, 36265, 58024, 70640, 72406, 72530, 116048, 144812, 145060, 181015, 289624, 290120, 297373, 362030, 579248, 580240, 594746, 724060, 1189492, 1448120, 1486865, 2378984, 2896240, 2973730, 4757968, 5947460, 6404399, 11894920, 12808798, 23789840, 25617596, 32021995, 51235192, 64043990, 102470384, 128087980, 256175960, 262580359, 512351920, 525160718, 1050321436, 1312901795, 2100642872, 2625803590, 4201285744, 5251607180, 10503214360, 21006428720]

約数ペア:

[(1, 21006428720), (2, 10503214360), (4, 5251607180), (5, 4201285744), (8, 2625803590), (10, 2100642872), (16, 1312901795), (20, 1050321436), (40, 525160718), (41, 512351920), (80, 262580359), (82, 256175960), (164, 128087980), (205, 102470384), (328, 64043990), (410, 51235192), (656, 32021995), (820, 25617596), (883, 23789840), (1640, 12808798), (1766, 11894920), (3280, 6404399), (3532, 5947460), (4415, 4757968), (7064, 2973730), (7253, 2896240), (8830, 2378984), (14128, 1486865), (14506, 1448120), (17660, 1189492), (29012, 724060), (35320, 594746), (36203, 580240), (36265, 579248), (58024, 362030), (70640, 297373), (72406, 290120), (72530, 289624), (116048, 181015), (144812, 145060)]