28407990100

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{89}}^1\times {\mathrm{65141}}^1$

素因数の和:65258

約数の個数: 108

約数和(自身を含む): 72516725820

約数和(自身を除く): 44108735720

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 89, 98, 100, 140, 175, 178, 196, 245, 350, 356, 445, 490, 623, 700, 890, 980, 1225, 1246, 1780, 2225, 2450, 2492, 3115, 4361, 4450, 4900, 6230, 8722, 8900, 12460, 15575, 17444, 21805, 31150, 43610, 62300, 65141, 87220, 109025, 130282, 218050, 260564, 325705, 436100, 455987, 651410, 911974, 1302820, 1628525, 1823948, 2279935, 3191909, 3257050, 4559870, 5797549, 6383818, 6514100, 9119740, 11399675, 11595098, 12767636, 15959545, 22799350, 23190196, 28987745, 31919090, 40582843, 45598700, 57975490, 63838180, 79797725, 81165686, 115950980, 144938725, 159595450, 162331372, 202914215, 284079901, 289877450, 319190900, 405828430, 568159802, 579754900, 811656860, 1014571075, 1136319604, 1420399505, 2029142150, 2840799010, 4058284300, 5681598020, 7101997525, 14203995050, 28407990100]

約数ペア:

[(1, 28407990100), (2, 14203995050), (4, 7101997525), (5, 5681598020), (7, 4058284300), (10, 2840799010), (14, 2029142150), (20, 1420399505), (25, 1136319604), (28, 1014571075), (35, 811656860), (49, 579754900), (50, 568159802), (70, 405828430), (89, 319190900), (98, 289877450), (100, 284079901), (140, 202914215), (175, 162331372), (178, 159595450), (196, 144938725), (245, 115950980), (350, 81165686), (356, 79797725), (445, 63838180), (490, 57975490), (623, 45598700), (700, 40582843), (890, 31919090), (980, 28987745), (1225, 23190196), (1246, 22799350), (1780, 15959545), (2225, 12767636), (2450, 11595098), (2492, 11399675), (3115, 9119740), (4361, 6514100), (4450, 6383818), (4900, 5797549), (6230, 4559870), (8722, 3257050), (8900, 3191909), (12460, 2279935), (15575, 1823948), (17444, 1628525), (21805, 1302820), (31150, 911974), (43610, 651410), (62300, 455987), (65141, 436100), (87220, 325705), (109025, 260564), (130282, 218050)]