18758720

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^2\times {\mathrm{61}}^1$

素因数の和:140

約数の個数: 84

約数和(自身を含む): 46913292

約数和(自身を除く): 28154572

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 61, 62, 64, 80, 122, 124, 155, 160, 244, 248, 305, 310, 320, 488, 496, 610, 620, 961, 976, 992, 1220, 1240, 1891, 1922, 1952, 1984, 2440, 2480, 3782, 3844, 3904, 4805, 4880, 4960, 7564, 7688, 9455, 9610, 9760, 9920, 15128, 15376, 18910, 19220, 19520, 30256, 30752, 37820, 38440, 58621, 60512, 61504, 75640, 76880, 117242, 121024, 151280, 153760, 234484, 293105, 302560, 307520, 468968, 586210, 605120, 937936, 1172420, 1875872, 2344840, 3751744, 4689680, 9379360, 18758720]

約数ペア:

[(1, 18758720), (2, 9379360), (4, 4689680), (5, 3751744), (8, 2344840), (10, 1875872), (16, 1172420), (20, 937936), (31, 605120), (32, 586210), (40, 468968), (61, 307520), (62, 302560), (64, 293105), (80, 234484), (122, 153760), (124, 151280), (155, 121024), (160, 117242), (244, 76880), (248, 75640), (305, 61504), (310, 60512), (320, 58621), (488, 38440), (496, 37820), (610, 30752), (620, 30256), (961, 19520), (976, 19220), (992, 18910), (1220, 15376), (1240, 15128), (1891, 9920), (1922, 9760), (1952, 9610), (1984, 9455), (2440, 7688), (2480, 7564), (3782, 4960), (3844, 4880), (3904, 4805)]