20819600

素因数分解:

$2^4\times 5^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:145

約数の個数: 120

約数和(自身を含む): 54615552

約数和(自身を除く): 33795952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 25, 31, 40, 46, 50, 62, 73, 80, 92, 100, 115, 124, 146, 155, 184, 200, 230, 248, 292, 310, 365, 368, 400, 460, 496, 575, 584, 620, 713, 730, 775, 920, 1150, 1168, 1240, 1426, 1460, 1550, 1679, 1825, 1840, 2263, 2300, 2480, 2852, 2920, 3100, 3358, 3565, 3650, 4526, 4600, 5704, 5840, 6200, 6716, 7130, 7300, 8395, 9052, 9200, 11315, 11408, 12400, 13432, 14260, 14600, 16790, 17825, 18104, 22630, 26864, 28520, 29200, 33580, 35650, 36208, 41975, 45260, 52049, 56575, 57040, 67160, 71300, 83950, 90520, 104098, 113150, 134320, 142600, 167900, 181040, 208196, 226300, 260245, 285200, 335800, 416392, 452600, 520490, 671600, 832784, 905200, 1040980, 1301225, 2081960, 2602450, 4163920, 5204900, 10409800, 20819600]

約数ペア:

[(1, 20819600), (2, 10409800), (4, 5204900), (5, 4163920), (8, 2602450), (10, 2081960), (16, 1301225), (20, 1040980), (23, 905200), (25, 832784), (31, 671600), (40, 520490), (46, 452600), (50, 416392), (62, 335800), (73, 285200), (80, 260245), (92, 226300), (100, 208196), (115, 181040), (124, 167900), (146, 142600), (155, 134320), (184, 113150), (200, 104098), (230, 90520), (248, 83950), (292, 71300), (310, 67160), (365, 57040), (368, 56575), (400, 52049), (460, 45260), (496, 41975), (575, 36208), (584, 35650), (620, 33580), (713, 29200), (730, 28520), (775, 26864), (920, 22630), (1150, 18104), (1168, 17825), (1240, 16790), (1426, 14600), (1460, 14260), (1550, 13432), (1679, 12400), (1825, 11408), (1840, 11315), (2263, 9200), (2300, 9052), (2480, 8395), (2852, 7300), (2920, 7130), (3100, 6716), (3358, 6200), (3565, 5840), (3650, 5704), (4526, 4600)]