20679990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:134

約数の個数: 128

約数和(自身を含む): 57480192

約数和(自身を除く): 36800202

約数列:

[1, 2, 3, 5, 6, 10, 15, 17, 23, 30, 34, 41, 43, 46, 51, 69, 82, 85, 86, 102, 115, 123, 129, 138, 170, 205, 215, 230, 246, 255, 258, 345, 391, 410, 430, 510, 615, 645, 690, 697, 731, 782, 943, 989, 1173, 1230, 1290, 1394, 1462, 1763, 1886, 1955, 1978, 2091, 2193, 2346, 2829, 2967, 3485, 3526, 3655, 3910, 4182, 4386, 4715, 4945, 5289, 5658, 5865, 5934, 6970, 7310, 8815, 9430, 9890, 10455, 10578, 10965, 11730, 14145, 14835, 16031, 16813, 17630, 20910, 21930, 26445, 28290, 29670, 29971, 32062, 33626, 40549, 48093, 50439, 52890, 59942, 80155, 81098, 84065, 89913, 96186, 100878, 121647, 149855, 160310, 168130, 179826, 202745, 240465, 243294, 252195, 299710, 405490, 449565, 480930, 504390, 608235, 689333, 899130, 1216470, 1378666, 2067999, 3446665, 4135998, 6893330, 10339995, 20679990]

約数ペア:

[(1, 20679990), (2, 10339995), (3, 6893330), (5, 4135998), (6, 3446665), (10, 2067999), (15, 1378666), (17, 1216470), (23, 899130), (30, 689333), (34, 608235), (41, 504390), (43, 480930), (46, 449565), (51, 405490), (69, 299710), (82, 252195), (85, 243294), (86, 240465), (102, 202745), (115, 179826), (123, 168130), (129, 160310), (138, 149855), (170, 121647), (205, 100878), (215, 96186), (230, 89913), (246, 84065), (255, 81098), (258, 80155), (345, 59942), (391, 52890), (410, 50439), (430, 48093), (510, 40549), (615, 33626), (645, 32062), (690, 29971), (697, 29670), (731, 28290), (782, 26445), (943, 21930), (989, 20910), (1173, 17630), (1230, 16813), (1290, 16031), (1394, 14835), (1462, 14145), (1763, 11730), (1886, 10965), (1955, 10578), (1978, 10455), (2091, 9890), (2193, 9430), (2346, 8815), (2829, 7310), (2967, 6970), (3485, 5934), (3526, 5865), (3655, 5658), (3910, 5289), (4182, 4945), (4386, 4715)]