21258500

素因数分解:

$2^2\times 5^3\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:138

約数の個数: 96

約数和(自身を含む): 51184224

約数和(自身を除く): 29925724

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 41, 50, 61, 68, 82, 85, 100, 122, 125, 164, 170, 205, 244, 250, 305, 340, 410, 425, 500, 610, 697, 820, 850, 1025, 1037, 1220, 1394, 1525, 1700, 2050, 2074, 2125, 2501, 2788, 3050, 3485, 4100, 4148, 4250, 5002, 5125, 5185, 6100, 6970, 7625, 8500, 10004, 10250, 10370, 12505, 13940, 15250, 17425, 20500, 20740, 25010, 25925, 30500, 34850, 42517, 50020, 51850, 62525, 69700, 85034, 87125, 103700, 125050, 129625, 170068, 174250, 212585, 250100, 259250, 312625, 348500, 425170, 518500, 625250, 850340, 1062925, 1250500, 2125850, 4251700, 5314625, 10629250, 21258500]

約数ペア:

[(1, 21258500), (2, 10629250), (4, 5314625), (5, 4251700), (10, 2125850), (17, 1250500), (20, 1062925), (25, 850340), (34, 625250), (41, 518500), (50, 425170), (61, 348500), (68, 312625), (82, 259250), (85, 250100), (100, 212585), (122, 174250), (125, 170068), (164, 129625), (170, 125050), (205, 103700), (244, 87125), (250, 85034), (305, 69700), (340, 62525), (410, 51850), (425, 50020), (500, 42517), (610, 34850), (697, 30500), (820, 25925), (850, 25010), (1025, 20740), (1037, 20500), (1220, 17425), (1394, 15250), (1525, 13940), (1700, 12505), (2050, 10370), (2074, 10250), (2125, 10004), (2501, 8500), (2788, 7625), (3050, 6970), (3485, 6100), (4100, 5185), (4148, 5125), (4250, 5002)]