19880820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:194

約数の個数: 144

約数和(自身を含む): 65454480

約数和(自身を除く): 45573660

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 73, 85, 89, 90, 102, 146, 153, 170, 178, 180, 204, 219, 255, 267, 292, 306, 340, 356, 365, 438, 445, 510, 534, 612, 657, 730, 765, 801, 876, 890, 1020, 1068, 1095, 1241, 1314, 1335, 1460, 1513, 1530, 1602, 1780, 2190, 2482, 2628, 2670, 3026, 3060, 3204, 3285, 3723, 4005, 4380, 4539, 4964, 5340, 6052, 6205, 6497, 6570, 7446, 7565, 8010, 9078, 11169, 12410, 12994, 13140, 13617, 14892, 15130, 16020, 18156, 18615, 19491, 22338, 22695, 24820, 25988, 27234, 30260, 32485, 37230, 38982, 44676, 45390, 54468, 55845, 58473, 64970, 68085, 74460, 77964, 90780, 97455, 110449, 111690, 116946, 129940, 136170, 194910, 220898, 223380, 233892, 272340, 292365, 331347, 389820, 441796, 552245, 584730, 662694, 994041, 1104490, 1169460, 1325388, 1656735, 1988082, 2208980, 3313470, 3976164, 4970205, 6626940, 9940410, 19880820]

約数ペア:

[(1, 19880820), (2, 9940410), (3, 6626940), (4, 4970205), (5, 3976164), (6, 3313470), (9, 2208980), (10, 1988082), (12, 1656735), (15, 1325388), (17, 1169460), (18, 1104490), (20, 994041), (30, 662694), (34, 584730), (36, 552245), (45, 441796), (51, 389820), (60, 331347), (68, 292365), (73, 272340), (85, 233892), (89, 223380), (90, 220898), (102, 194910), (146, 136170), (153, 129940), (170, 116946), (178, 111690), (180, 110449), (204, 97455), (219, 90780), (255, 77964), (267, 74460), (292, 68085), (306, 64970), (340, 58473), (356, 55845), (365, 54468), (438, 45390), (445, 44676), (510, 38982), (534, 37230), (612, 32485), (657, 30260), (730, 27234), (765, 25988), (801, 24820), (876, 22695), (890, 22338), (1020, 19491), (1068, 18615), (1095, 18156), (1241, 16020), (1314, 15130), (1335, 14892), (1460, 13617), (1513, 13140), (1530, 12994), (1602, 12410), (1780, 11169), (2190, 9078), (2482, 8010), (2628, 7565), (2670, 7446), (3026, 6570), (3060, 6497), (3204, 6205), (3285, 6052), (3723, 5340), (4005, 4964), (4380, 4539)]