20781990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{17}}^3\times {\mathrm{47}}^1$

素因数の和:111

約数の個数: 96

約数和(自身を含む): 58631040

約数和(自身を除く): 37849050

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 17, 18, 30, 34, 45, 47, 51, 85, 90, 94, 102, 141, 153, 170, 235, 255, 282, 289, 306, 423, 470, 510, 578, 705, 765, 799, 846, 867, 1410, 1445, 1530, 1598, 1734, 2115, 2397, 2601, 2890, 3995, 4230, 4335, 4794, 4913, 5202, 7191, 7990, 8670, 9826, 11985, 13005, 13583, 14382, 14739, 23970, 24565, 26010, 27166, 29478, 35955, 40749, 44217, 49130, 67915, 71910, 73695, 81498, 88434, 122247, 135830, 147390, 203745, 221085, 230911, 244494, 407490, 442170, 461822, 611235, 692733, 1154555, 1222470, 1385466, 2078199, 2309110, 3463665, 4156398, 6927330, 10390995, 20781990]

約数ペア:

[(1, 20781990), (2, 10390995), (3, 6927330), (5, 4156398), (6, 3463665), (9, 2309110), (10, 2078199), (15, 1385466), (17, 1222470), (18, 1154555), (30, 692733), (34, 611235), (45, 461822), (47, 442170), (51, 407490), (85, 244494), (90, 230911), (94, 221085), (102, 203745), (141, 147390), (153, 135830), (170, 122247), (235, 88434), (255, 81498), (282, 73695), (289, 71910), (306, 67915), (423, 49130), (470, 44217), (510, 40749), (578, 35955), (705, 29478), (765, 27166), (799, 26010), (846, 24565), (867, 23970), (1410, 14739), (1445, 14382), (1530, 13583), (1598, 13005), (1734, 11985), (2115, 9826), (2397, 8670), (2601, 7990), (2890, 7191), (3995, 5202), (4230, 4913), (4335, 4794)]