28579720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:155

約数の個数: 128

約数和(自身を含む): 75932640

約数和(自身を除く): 47352920

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 53, 61, 65, 68, 85, 104, 106, 122, 130, 136, 170, 212, 221, 244, 260, 265, 305, 340, 424, 442, 488, 520, 530, 610, 680, 689, 793, 884, 901, 1037, 1060, 1105, 1220, 1378, 1586, 1768, 1802, 2074, 2120, 2210, 2440, 2756, 3172, 3233, 3445, 3604, 3965, 4148, 4420, 4505, 5185, 5512, 6344, 6466, 6890, 7208, 7930, 8296, 8840, 9010, 10370, 11713, 12932, 13481, 13780, 15860, 16165, 18020, 20740, 23426, 25864, 26962, 27560, 31720, 32330, 36040, 41480, 42029, 46852, 53924, 54961, 58565, 64660, 67405, 84058, 93704, 107848, 109922, 117130, 129320, 134810, 168116, 210145, 219844, 234260, 269620, 274805, 336232, 420290, 439688, 468520, 539240, 549610, 714493, 840580, 1099220, 1428986, 1681160, 2198440, 2857972, 3572465, 5715944, 7144930, 14289860, 28579720]

約数ペア:

[(1, 28579720), (2, 14289860), (4, 7144930), (5, 5715944), (8, 3572465), (10, 2857972), (13, 2198440), (17, 1681160), (20, 1428986), (26, 1099220), (34, 840580), (40, 714493), (52, 549610), (53, 539240), (61, 468520), (65, 439688), (68, 420290), (85, 336232), (104, 274805), (106, 269620), (122, 234260), (130, 219844), (136, 210145), (170, 168116), (212, 134810), (221, 129320), (244, 117130), (260, 109922), (265, 107848), (305, 93704), (340, 84058), (424, 67405), (442, 64660), (488, 58565), (520, 54961), (530, 53924), (610, 46852), (680, 42029), (689, 41480), (793, 36040), (884, 32330), (901, 31720), (1037, 27560), (1060, 26962), (1105, 25864), (1220, 23426), (1378, 20740), (1586, 18020), (1768, 16165), (1802, 15860), (2074, 13780), (2120, 13481), (2210, 12932), (2440, 11713), (2756, 10370), (3172, 9010), (3233, 8840), (3445, 8296), (3604, 7930), (3965, 7208), (4148, 6890), (4420, 6466), (4505, 6344), (5185, 5512)]