19561968

素因数分解:

$2^4\times 3^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:223

約数の個数: 120

約数和(自身を含む): 59366736

約数和(自身を除く): 39804768

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 17, 18, 24, 34, 36, 48, 51, 61, 68, 72, 102, 122, 131, 136, 144, 153, 183, 204, 244, 262, 272, 306, 366, 393, 408, 488, 524, 549, 612, 732, 786, 816, 976, 1037, 1048, 1098, 1179, 1224, 1464, 1572, 2074, 2096, 2196, 2227, 2358, 2448, 2928, 3111, 3144, 4148, 4392, 4454, 4716, 6222, 6288, 6681, 7991, 8296, 8784, 8908, 9333, 9432, 12444, 13362, 15982, 16592, 17816, 18666, 18864, 20043, 23973, 24888, 26724, 31964, 35632, 37332, 40086, 47946, 49776, 53448, 63928, 71919, 74664, 80172, 95892, 106896, 127856, 135847, 143838, 149328, 160344, 191784, 271694, 287676, 320688, 383568, 407541, 543388, 575352, 815082, 1086776, 1150704, 1222623, 1630164, 2173552, 2445246, 3260328, 4890492, 6520656, 9780984, 19561968]

約数ペア:

[(1, 19561968), (2, 9780984), (3, 6520656), (4, 4890492), (6, 3260328), (8, 2445246), (9, 2173552), (12, 1630164), (16, 1222623), (17, 1150704), (18, 1086776), (24, 815082), (34, 575352), (36, 543388), (48, 407541), (51, 383568), (61, 320688), (68, 287676), (72, 271694), (102, 191784), (122, 160344), (131, 149328), (136, 143838), (144, 135847), (153, 127856), (183, 106896), (204, 95892), (244, 80172), (262, 74664), (272, 71919), (306, 63928), (366, 53448), (393, 49776), (408, 47946), (488, 40086), (524, 37332), (549, 35632), (612, 31964), (732, 26724), (786, 24888), (816, 23973), (976, 20043), (1037, 18864), (1048, 18666), (1098, 17816), (1179, 16592), (1224, 15982), (1464, 13362), (1572, 12444), (2074, 9432), (2096, 9333), (2196, 8908), (2227, 8784), (2358, 8296), (2448, 7991), (2928, 6681), (3111, 6288), (3144, 6222), (4148, 4716), (4392, 4454)]