19980100

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:134

約数の個数: 144

約数和(自身を含む): 55496448

約数和(自身を除く): 35516348

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 23, 25, 28, 34, 35, 46, 50, 68, 70, 73, 85, 92, 100, 115, 119, 140, 146, 161, 170, 175, 230, 238, 292, 322, 340, 350, 365, 391, 425, 460, 476, 511, 575, 595, 644, 700, 730, 782, 805, 850, 1022, 1150, 1190, 1241, 1460, 1564, 1610, 1679, 1700, 1825, 1955, 2044, 2300, 2380, 2482, 2555, 2737, 2975, 3220, 3358, 3650, 3910, 4025, 4964, 5110, 5474, 5950, 6205, 6716, 7300, 7820, 8050, 8395, 8687, 9775, 10220, 10948, 11753, 11900, 12410, 12775, 13685, 16100, 16790, 17374, 19550, 23506, 24820, 25550, 27370, 28543, 31025, 33580, 34748, 39100, 41975, 43435, 47012, 51100, 54740, 57086, 58765, 62050, 68425, 83950, 86870, 114172, 117530, 124100, 136850, 142715, 167900, 173740, 199801, 217175, 235060, 273700, 285430, 293825, 399602, 434350, 570860, 587650, 713575, 799204, 868700, 999005, 1175300, 1427150, 1998010, 2854300, 3996020, 4995025, 9990050, 19980100]

約数ペア:

[(1, 19980100), (2, 9990050), (4, 4995025), (5, 3996020), (7, 2854300), (10, 1998010), (14, 1427150), (17, 1175300), (20, 999005), (23, 868700), (25, 799204), (28, 713575), (34, 587650), (35, 570860), (46, 434350), (50, 399602), (68, 293825), (70, 285430), (73, 273700), (85, 235060), (92, 217175), (100, 199801), (115, 173740), (119, 167900), (140, 142715), (146, 136850), (161, 124100), (170, 117530), (175, 114172), (230, 86870), (238, 83950), (292, 68425), (322, 62050), (340, 58765), (350, 57086), (365, 54740), (391, 51100), (425, 47012), (460, 43435), (476, 41975), (511, 39100), (575, 34748), (595, 33580), (644, 31025), (700, 28543), (730, 27370), (782, 25550), (805, 24820), (850, 23506), (1022, 19550), (1150, 17374), (1190, 16790), (1241, 16100), (1460, 13685), (1564, 12775), (1610, 12410), (1679, 11900), (1700, 11753), (1825, 10948), (1955, 10220), (2044, 9775), (2300, 8687), (2380, 8395), (2482, 8050), (2555, 7820), (2737, 7300), (2975, 6716), (3220, 6205), (3358, 5950), (3650, 5474), (3910, 5110), (4025, 4964)]